JEE Main & Advanced Chemistry Biomolecules / जैव-अणु Question Bank

done Carbohydrates Total Questions - 133

• question_answer1)
  The change in optical rotation, with time, of freshly prepared solution of sugar is known as          [CPMT 1982, 85; BHU 1997]
  A)
                  Rotatory motion               done clear
  B)
                  Inversion done clear
  C)
                  Specific rotation               done clear
  D)
                  Mutarotation done clear
  View Solution play_arrow

• question_answer2)
  Gun-cotton is
  A)
                  Nitrosucrose      done clear
  B)
                  Nitrocellulose done clear
  C)
                  Nitroglucose      done clear
  D)
                  Nitropicrin done clear
  View Solution play_arrow

• question_answer3)
  Which of the following monosaccharide is a pentose [CPMT 1982, 87, 89, 93]
  A)
                  Galactose            done clear
  B)
                  Glucose done clear
  C)
                  Fructose              done clear
  D)
                  Arabinose done clear
  View Solution play_arrow

• question_answer4)
  Amide group is present in
  A)
                  Lipids     done clear
  B)
                  Carbohydrates done clear
  C)
                  Amino acids        done clear
  D)
                  Proteins done clear
  View Solution play_arrow

• question_answer5)
  Which of the following is a carbohydrate
  A)
                  Leucine                done clear
  B)
                  Albumin done clear
  C)
                  Inulin     done clear
  D)
                  Maltase done clear
  View Solution play_arrow

• question_answer6)
  General formula for carbohydrates is
  A)
                  \[{{C}_{n}}{{H}_{2n}}{{O}_{2n+2}}\]        done clear
  B)
                  \[{{C}_{x}}{{({{H}_{2}}O)}_{2x}}\] done clear
  C)
                  \[{{C}_{x}}{{({{H}_{2}}O)}_{y}}\]               done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer7)
  Benedict solution provides          [CPMT 1983]
  A)
                  \[A{{g}^{+}}\]    done clear
  B)
                  \[L{{i}^{+}}\] done clear
  C)
                  \[C{{u}^{+2}}\]  done clear
  D)
                  \[B{{a}^{+2}}\] done clear
  View Solution play_arrow

• question_answer8)
  Glucose gives silver mirror with Tollen's reagent. It shows the presence of  [MNR 1981; CPMT 1974, 81; MP PMT 1994]
  A)
                  An acidic group done clear
  B)
                  An alcoholic group done clear
  C)
                  A ketonic group                done clear
  D)
                  An aldehydic group done clear
  View Solution play_arrow

• question_answer9)
  A certain compound gives negative test with ninhydrin and positive test with Benedict's solution. The compound is [NCERT 1978; KCET 2000]
  A)
                  A protein             done clear
  B)
                  A monosaccharide done clear
  C)
                  A lipid    done clear
  D)
                  An amino acid done clear
  View Solution play_arrow

• question_answer10)
  An organic compound answers Molisch's test as well as Benedict's test. But it does not answer Scliwanoff's test. Most probably, it is     [KCET 2003]
  A)
                  Sucrose                done clear
  B)
                  Protein done clear
  C)
                  Fructose done clear
  D)
                  Maltose done clear
  View Solution play_arrow

• question_answer11)
  Glucose when heated with \[C{{H}_{3}}OH\] in presence of dry HCl gas gives \[\alpha \] and \[\beta -\text{methyl}\] glucosides because it contains [CPMT 1982, 85]
  A)
                  An aldehyde group         done clear
  B)
                  A \[-C{{H}_{2}}OH\] group done clear
  C)
                  A ring structure done clear
  D)
                  Five hydroxyl groups done clear
  View Solution play_arrow

• question_answer12)
  Which one is a disaccharide         [CPMT 1981, 83]
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Xylose   done clear
  D)
                  Sucrose done clear
  View Solution play_arrow

• question_answer13)
  Molecular formula \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] is of
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Both A and B      done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer14)
  Hydrolysis of sucrose is called [BHU 1979, 83; Pb. PMT 1999; Pb. CET 2000]
  A)
                  Esterification      done clear
  B)
                  Saponification done clear
  C)
                  Inversion             done clear
  D)
                  Hydration done clear
  View Solution play_arrow

• question_answer15)
  In the 'glycolipids', the two sugars known to occur are glucose and
  A)
                  Fructose              done clear
  B)
                  Lactose done clear
  C)
                  Galactose            done clear
  D)
                  Sucrose done clear
  View Solution play_arrow

• question_answer16)
  The ?epimerisation? involves
  A)
                  Change of configuration done clear
  B)
                  Addition of one more 'C' done clear
  C)
                  Substration of a 'C' done clear
  D)
                  Conversion of \[-CHO\] to \[-C=O\] done clear
  View Solution play_arrow

• question_answer17)
  The compound which does not contain an asymmetric carbon atom is
  A)
                  Glycolaldehyde done clear
  B)
                  Glyceraldehyde done clear
  C)
                  Glucose                done clear
  D)
                  Galactose done clear
  View Solution play_arrow

• question_answer18)
  Which of the following sign indicate that the sugar is actually ?dextrorotatory?
  A)
                  ?             done clear
  B)
                  + done clear
  C)
                  R ? done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer19)
  The standard compound for determination of configuration in the ?sugar chemistry? is
  A)
                  Glycolaldehyde done clear
  B)
                  Glyceraldehyde done clear
  C)
                  Glucose                done clear
  D)
                  Fructose done clear
  View Solution play_arrow

• question_answer20)
  Sugars are
  A)
                  Optically active polyhydroxy aldehydes done clear
  B)
                  Optically active polyhydroxy ketones done clear
  C)
                  Optically active polyhydroxy aldehydes or ketones done clear
  D)
                  Polyhydroxy aldehydes or ketones which may or may not be optically active done clear
  View Solution play_arrow

• question_answer21)
  Molecular formula of pentahydroxy acid obtained when glucose is oxidised with \[B{{r}_{2}}\] water is
  A)
                  \[{{C}_{6}}{{H}_{12}}{{O}_{7}}\]                done clear
  B)
                  \[{{C}_{6}}{{H}_{12}}{{O}_{8}}\] done clear
  C)
                  \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]                done clear
  D)
                  \[{{C}_{6}}{{H}_{10}}{{O}_{6}}\] done clear
  View Solution play_arrow

• question_answer22)
  The 'phosphoglycerides' occur in
  A)
                  The brain and the spinal chord done clear
  B)
                  Nails and hairs done clear
  C)
                  Oils and fats done clear
  D)
                  Waxes done clear
  View Solution play_arrow

• question_answer23)
  Sucrose is a                                         [CPMT 1983]
  A)
                  Monosaccharide              done clear
  B)
                  Disaccharide done clear
  C)
                  Trisaccharide      done clear
  D)
                  Polysaccharide done clear
  View Solution play_arrow

• question_answer24)
  The commonest disaccharide has the molecular formula [CPMT 1982; Manipal MEE 1995; MP PET 1999; AIIMS 1999]
  A)
                  \[{{C}_{10}}{{H}_{18}}{{O}_{9}}\]              done clear
  B)
                  \[{{C}_{10}}{{H}_{20}}{{O}_{10}}\] done clear
  C)
                  \[{{C}_{18}}{{H}_{22}}{{O}_{11}}\]            done clear
  D)
                  \[{{C}_{12}}{{H}_{22}}{{O}_{11}}\] done clear
  View Solution play_arrow

• question_answer25)
  On complete hydrolysis of starch, we finally get [MNR 1982; DPMT 1979; CBSE PMT 1991; MP PMT 1987; MP PET 1993]
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Glucose and fructose     done clear
  D)
                  Sucrose done clear
  View Solution play_arrow

• question_answer26)
  Which is monosaccharide
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Galactose            done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer27)
  Which is polysaccharide
  A)
                  Starch   done clear
  B)
                  Cellulose done clear
  C)
                  Glycogen             done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer28)
  The calorific values of fats, carbohydrates and proteins vary in the order
  A)
                  Fats > Carbohydrates > Proteins done clear
  B)
                  Fats > Proteins > Carbohydrates done clear
  C)
                  Carbohydrates > Proteins > Fats done clear
  D)
                  Proteins > Carbohydrates > Fats done clear
  View Solution play_arrow

• question_answer29)
  Gun-cotton is obtained when conc. nitric acid reacts with
  A)
                  Glycerine             done clear
  B)
                  Glycol done clear
  C)
                  Cellulose              done clear
  D)
                  Starch done clear
  View Solution play_arrow

• question_answer30)
  A carbohydrate consists of          [NCERT 1971]
  A)
                  C and O done clear
  B)
                  \[C,\,\,H\] and O done clear
  C)
                  \[C,\,\,H,\,\,N\] and O   done clear
  D)
                  C and H done clear
  View Solution play_arrow

• question_answer31)
  Glucose forms many derivatives. The derivative which will help to prove the furanose structure is [AIIMS 1980; DPMT 1985]
  A)
                  Acetyl   done clear
  B)
                  Benzoyl done clear
  C)
                  Osazone              done clear
  D)
                  Isopropylidene done clear
  View Solution play_arrow

• question_answer32)
  Glucose and fructose form          [MP PMT 1986]
  A)
                  Same osazone done clear
  B)
                  Same acid on oxidation done clear
  C)
                  Same alcohol when reduced done clear
  D)
                  Different osazone done clear
  View Solution play_arrow

• question_answer33)
  On heating with conc. \[{{H}_{2}}S{{O}_{4}},\]sucrose gives         [DPMT 1984]
  A)
                  CO and \[C{{O}_{2}}\]    done clear
  B)
                  CO and \[S{{O}_{2}}\] done clear
  C)
                  \[CO,\,\,C{{O}_{2}}\] and \[S{{O}_{2}}\]                done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer34)
  The letter ?D? in carbohydrates represents
  A)
                  Its direct synthesis          done clear
  B)
                  Its dextrorotation done clear
  C)
                  Its mutarotation               done clear
  D)
                  Its configuration done clear
  View Solution play_arrow

• question_answer35)
  Starch can be used as an indicator for the detection of traces of                                                [CPMT 1986]
  A)
                  Glucose in aqueous solution done clear
  B)
                  Protein in blood done clear
  C)
                  Iodine in aqueous solution done clear
  D)
                  Urea in blood done clear
  View Solution play_arrow

• question_answer36)
  It is best to carry out reactions with sugars in neutral or acid medium and not in alkaline medium. This is because in alkaline medium sugars undergo one of the following changes                                   [AIIMS 1982]
  A)
                  Racemisation     done clear
  B)
                  Decomposition done clear
  C)
                  Inversion             done clear
  D)
                  Rearrangement done clear
  View Solution play_arrow

• question_answer37)
  Which one of the following compounds is found abundantly in nature    [BHU 1983; Manipal MEE 1995; DCE 2004]
  A)
                  Fructose              done clear
  B)
                  Starch done clear
  C)
                  Glucose                done clear
  D)
                  Cellulose done clear
  View Solution play_arrow

• question_answer38)
  The substance that forms the plant cell walls is or Which carbohydrates is an essential constituents of plant cells [KCET 1984; MP PET 1999; CPMT 2002]
  A)
                  Cellulose              done clear
  B)
                  Sucrose done clear
  C)
                  Vitamins              done clear
  D)
                  Starch done clear
  View Solution play_arrow

• question_answer39)
  Sugar can be tested in urine by
  A)
                  Molisch test       done clear
  B)
                  Dunstan's test done clear
  C)
                  Benedict's test  done clear
  D)
                  Legal's test done clear
  View Solution play_arrow

• question_answer40)
  When sucrose is heated with conc. \[HN{{O}_{3}}\] the product is [CPMT 1979]
  A)
                  Sucrose nitrate done clear
  B)
                  Formic acid done clear
  C)
                  Oxalic acid           done clear
  D)
                  Citric acid done clear
  View Solution play_arrow

• question_answer41)
  Amylopectin is  [KCET 2005]
  A)
                  Water soluble done clear
  B)
                  Water insoluble done clear
  C)
                  Forms colloidal solution with water done clear
  D)
                  Both B and C done clear
  View Solution play_arrow

• question_answer42)
  Which of the following statements about ribose is incorrect [CPMT 1985]
  A)
                  It is a polyhydroxy compound done clear
  B)
                  It is an aldehyde sugar done clear
  C)
                  It has six carbon atoms done clear
  D)
                  It exhibits optical activity done clear
  View Solution play_arrow

• question_answer43)
  Maltose contains how many oxygen atoms
  A)
                  6              done clear
  B)
                  10 done clear
  C)
                  11           done clear
  D)
                  22 done clear
  View Solution play_arrow

• question_answer44)
  The correct name of  ?sucrose' is
  A)
                  \[\alpha -D-\text{glucopyranosyl}-\beta -D-\text{fructofuranoside}\] done clear
  B)
                  \[\beta -D-\text{glucopyranosyl}-\beta -D-\text{fructofuranoside}\] done clear
  C)
                  \[\alpha -D-\text{glucopyranosyl}-\alpha -D-\text{fructofuranoside}\] done clear
  D)
                  \[\beta -D-\text{glucopyranosyl}-\alpha -L-\text{fructofuranoside}\] done clear
  View Solution play_arrow

• question_answer45)
  Sucrose is
  A)
                  Laevorotatory   done clear
  B)
                  Dextrorotatory done clear
  C)
                  Racemic mixture              done clear
  D)
                  Optically inactive done clear
  View Solution play_arrow

• question_answer46)
  The hydrolysis of sucrose produces a mixture which is
  A)
                  Laevorotatory   done clear
  B)
                  Dextrorotatory done clear
  C)
                  Equally both (+) and (?) rotatory done clear
  D)
                  Optically inactive done clear
  View Solution play_arrow

• question_answer47)
  Sucrose is
  A)
                  A reducing sugar done clear
  B)
                  Not a reducing sugar done clear
  C)
                  Partial reducing sugar done clear
  D)
                  Mixed sugar done clear
  View Solution play_arrow

• question_answer48)
  Sucrose contains which of the following groups
  A)
                  \[-CHO\]              done clear
  B)
                  \[>C=O\] done clear
  C)
                  Both A and B      done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer49)
  The fructose molecule in sucrose exists as
  A)
                  Furanose             done clear
  B)
                  Pyranose done clear
  C)
                  Open chain         done clear
  D)
                  All done clear
  View Solution play_arrow

• question_answer50)
  Which one of the following is laevorotatory         [DPMT 1989]
  A)
                  Glucose                done clear
  B)
                  Sucrose done clear
  C)
                  Fructose              done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer51)
  Chemically 'digestion' is                 [NCERT 1978]
  A)
                  Hydrolysis           done clear
  B)
                  Change in bacteria done clear
  C)
                  Hydrogenation  done clear
  D)
                  Dehydrogenation done clear
  View Solution play_arrow

• question_answer52)
  Which one of the following is the reagent used to identify glucose                                           [MP PMT 1993]
  A)
                  Neutral ferric chloride done clear
  B)
                  Chloroform and alcoholic KOH done clear
  C)
                  Ammoniacal silver nitrate done clear
  D)
                  Sodium ethoxide done clear
  View Solution play_arrow

• question_answer53)
  Sucrose on hydrolysis gives [MP PMT 1993; Bihar MEE 1997]
  A)
                  Two molecules of glucose done clear
  B)
                  Two molecules of fructose done clear
  C)
                  One molecule each of glucose and fructose done clear
  D)
                  One molecule each of glucose and mannose done clear
  View Solution play_arrow

• question_answer54)
  Which of the following is a disaccharide                 [CPMT 1990, 94]
  A)
                  Lactose done clear
  B)
                  Starch done clear
  C)
                  Cellulose              done clear
  D)
                  Glucose done clear
  View Solution play_arrow

• question_answer55)
  Glucose cannot be classified as  [CPMT 1989]
  A)
                  A hexose             done clear
  B)
                  A carbohydrate done clear
  C)
                  An oligosaccharide          done clear
  D)
                  An aldose done clear
  View Solution play_arrow

• question_answer56)
  The reagent which forms crystalline osazone derivative when reacted with glucose, is    [CPMT 1990]
  A)
                  Fehling solution                done clear
  B)
                  Phenylhydrazine done clear
  C)
                  Benedict solution             done clear
  D)
                  Hydroxylamine done clear
  View Solution play_arrow

• question_answer57)
  An enzyme which brings about the conversion of starch into maltose is known as             [BHU 1979]
  A)
                  Maltase                done clear
  B)
                  Zymase done clear
  C)
                  Invertase             done clear
  D)
                  Diastase done clear
  View Solution play_arrow

• question_answer58)
  Canesugar on hydrolysis gives [MADT Bihar 1984; NCERT 1977; AMU 1985]
  A)
                  Glucose and maltose      done clear
  B)
                  Glucose and lactose done clear
  C)
                  Glucose and fructose     done clear
  D)
                  Only glucose done clear
  View Solution play_arrow

• question_answer59)
  Glucose is a                                        [CPMT 1984]
  A)
                  Monosaccharide              done clear
  B)
                  Disaccharide done clear
  C)
                  Trisaccharide      done clear
  D)
                  Polysaccharide done clear
  View Solution play_arrow

• question_answer60)
  Which carbohydrate is used in silvering of mirrors [BHU 1973; CPMT 1991]
  A)
                  Sucrose                done clear
  B)
                  Starch done clear
  C)
                  Glucose                done clear
  D)
                  Fructose done clear
  View Solution play_arrow

• question_answer61)
  A carbohydrate that cannot be hydrolysed to simpler forms is called
  A)
                  Disaccharide       done clear
  B)
                  Monosaccharide done clear
  C)
                  Polysaccharide done clear
  D)
                  Trisaccharide done clear
  View Solution play_arrow

• question_answer62)
  If monosaccharide contains an aldehyde group, it is known as
  A)
                  Epimer  done clear
  B)
                  Osones done clear
  C)
                  Osazone              done clear
  D)
                  Aldose done clear
  View Solution play_arrow

• question_answer63)
  If a monosaccharide contains a ketogroup, it is known as
  A)
                  Ketose  done clear
  B)
                  Osones done clear
  C)
                  Epimer  done clear
  D)
                  Osazone done clear
  View Solution play_arrow

• question_answer64)
  The aqueous solution of a carbohydrate gives dark blue colour with iodine. It is
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Sucrose                done clear
  D)
                  Starch done clear
  View Solution play_arrow

• question_answer65)
  Which of the following carbohydrates is a disaccharide
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Raffinose             done clear
  D)
                  Maltose done clear
  View Solution play_arrow

• question_answer66)
  Optical activity is shown by
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Sucrose                done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer67)
  Which is a reducing sugar
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Galactose            done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer68)
  The ultimate product of oxidation of most of hydrogen and carbon in foodstuffs are       [CPMT 1981]
  A)
                  \[{{H}_{2}}O\] alone       done clear
  B)
                  \[C{{O}_{2}}\] alone done clear
  C)
                  \[{{H}_{2}}O\] and \[C{{O}_{2}}\]             done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer69)
  Osazone formation involves only 2 carbon atoms of glucose because of                                                 [MP PMT 1986]
  A)
                  Chelation             done clear
  B)
                  Oxidation done clear
  C)
                  Reduction           done clear
  D)
                  Hydrolysis done clear
  View Solution play_arrow

• question_answer70)
  Glucose will show mutarotation when solvent is [MP PMT 1986]
  A)
                  Acidic    done clear
  B)
                  Basic done clear
  C)
                  Neutral done clear
  D)
                  Amphoteric done clear
  View Solution play_arrow

• question_answer71)
  Glucose contains                                              [CPMT 1982]
  A)
                  One \[-CHO\] group done clear
  B)
                  Five \[-OH\] groups done clear
  C)
                  One primary alcoholic group done clear
  D)
                  Four secondary alcoholic groups done clear
  E)
                  All are correct done clear
  View Solution play_arrow

• question_answer72)
  Carbohydrates are stored in human body as [MP PMT 1999; Kerala PMT 2004]
  A)
                  Glucose                done clear
  B)
                  Glycogen done clear
  C)
                  Starch   done clear
  D)
                  Fructose done clear
  View Solution play_arrow

• question_answer73)
  An example of a disaccharide made up of two units of the same monosaccharides is                       [KCET 1989; MP PET 1996; AFMC 2005]
  A)
                  Sucrose                done clear
  B)
                  Maltose done clear
  C)
                  Lactose done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer74)
  The sugar present in fruits is       [KCET 1984]
  A)
                  Fructose              done clear
  B)
                  Glucose done clear
  C)
                  Sucrose                done clear
  D)
                  Galactose done clear
  View Solution play_arrow

• question_answer75)
  Carbohydrates are                                          [MADT Bihar 1983]
  A)
                  Hydrates of carbon done clear
  B)
                  Polyhydroxy aldehydes or ketones done clear
  C)
                  Polyhydroxy acid compounds done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer76)
  Glucose and fructose are             [Bihar MADT 1982]
  A)
                  Isotopes done clear
  B)
                  Isotones done clear
  C)
                  Isomers done clear
  D)
                  Homologues of each other done clear
  View Solution play_arrow

• question_answer77)
  Hydrolytic conversion of sucrose into glucose and fructose is known as                                  [BHU 1979, 97]
  A)
                  Induction             done clear
  B)
                  Saponification done clear
  C)
                  Inversion             done clear
  D)
                  Esterification done clear
  View Solution play_arrow

• question_answer78)
  Starch is a polymer of [DPMT 1982; CPMT 1975, 80; MP PMT 1994]
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Both A and B      done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer79)
  To become a carbohydrate a compound must contain at least                                    [AFMC 1991]
  A)
                  2 carbons             done clear
  B)
                  3 carbons done clear
  C)
                  4 carbons             done clear
  D)
                  6 carbons done clear
  View Solution play_arrow

• question_answer80)
  Lactose on hydrolysis gives          [KCET 1983]
  A)
                  Two glucose molecules done clear
  B)
                  Two galactose molecules done clear
  C)
                  A galactose molecule and a fructose molecule done clear
  D)
                  A galactose molecule and a glucose molecule done clear
  View Solution play_arrow

• question_answer81)
  An example of non-reducing sugar is      [KCET 1988]
  A)
                  Cane sugar          done clear
  B)
                  Fructose done clear
  C)
                  Lactose done clear
  D)
                  Cellobiose done clear
  View Solution play_arrow

• question_answer82)
  Cellulose is a polymer of               [KCET 1984]
  A)
                  L-fructose           done clear
  B)
                  D-mannose done clear
  C)
                  D-glucose            done clear
  D)
                  Amylose done clear
  View Solution play_arrow

• question_answer83)
  The intermediate compound formed in the conversion of starch to glucose is     [KCET 1984]
  A)
                  Lactose done clear
  B)
                  Sucrose done clear
  C)
                  Maltose               done clear
  D)
                  Fructose done clear
  View Solution play_arrow

• question_answer84)
  Invertase brings about the conversion of              [KCET 1986]
  A)
                  Starch to glucose              done clear
  B)
                  Sucrose to glucose and fructose done clear
  C)
                  Maltose to glucose done clear
  D)
                  Glucose to \[{{C}_{2}}{{H}_{5}}OH\] and \[C{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer85)
  Which of the following pentoses will be optically active                 \[\begin{matrix}    CHO  \\    |  \\    HCOH  \\    |  \\    HOCH  \\    |  \\    HCOH  \\    |  \\    C{{H}_{2}}OH  \\    I  \\ \end{matrix}\]  \[\begin{matrix}    CHO  \\    |  \\    HCOH  \\    |  \\    HCOH  \\    |  \\    HOCH  \\    |  \\    C{{H}_{2}}OH  \\    II  \\ \end{matrix}\]  \[\begin{matrix}    CHO  \\    |  \\    HCOH  \\    |  \\    HCOH  \\    |  \\    HCOH  \\    |  \\    C{{H}_{2}}OH  \\    III  \\ \end{matrix}\] [MP PET 1994]
  A)
                  All           done clear
  B)
                  II and III done clear
  C)
                  I               done clear
  D)
                  II done clear
  View Solution play_arrow

• question_answer86)
  \[\alpha -D-\]glucose and \[\beta -D-\]glucose differ from each other due to difference in one of the carbons with respect to its [CBSE PMT 1995; AFMC 1999]
  A)
                  Size of hemiacetal ring   done clear
  B)
                  Number of OH groups done clear
  C)
                  Configuration    done clear
  D)
                  Conformation done clear
  View Solution play_arrow

• question_answer87)
  Which carbohydrates has highest abundance in human blood                                     [MP PET 1995]
  A)
                  d-fructose           done clear
  B)
                  d-glucose done clear
  C)
                  Sucrose                done clear
  D)
                  Lactose done clear
  View Solution play_arrow

• question_answer88)
  Formation of silver mirror by glucose shows that it is a/an
  A)
                  Oxidising agent done clear
  B)
                  Acid done clear
  C)
                  Reducing agent done clear
  D)
                  A salt of silver done clear
  View Solution play_arrow

• question_answer89)
  Which of the following statements is right
  A)
                  Cellulose are linear polymers of \[\beta -\]glucose molecules with \[\beta -1,\,4-\]linkages done clear
  B)
                  Starches are polymers of \[\alpha -\]glucose molecules with \[\beta -1,\,4-\]linkages and some \[\beta -1,\,6-\]cross-linkages done clear
  C)
                  Proteins are polyamides of \[\beta -\]amino acids done clear
  D)
                  The structural information about their biosynthesis is contained in a class of compounds called nucleic acids, e.g. RNA and DNA done clear
  View Solution play_arrow

• question_answer90)
  The number of atoms in the cyclic structure of D-fructose is [MP PMT 1997]
  A)
                  5              done clear
  B)
                  6 done clear
  C)
                  4              done clear
  D)
                  7 done clear
  View Solution play_arrow

• question_answer91)
  Which is used in motion picture films
  A)
                  Cellulose acetate             done clear
  B)
                  Glucose acetate done clear
  C)
                  Starch acetate   done clear
  D)
                  Sucrose acetate done clear
  View Solution play_arrow

• question_answer92)
  Glucose reacts with acetic anhydride to form [KCET 1996]
  A)
                  Mono-acetate   done clear
  B)
                  Tetra-acetate done clear
  C)
                  Penta-acetate   done clear
  D)
                  Hexa-acetate done clear
  View Solution play_arrow

• question_answer93)
  Which of the following does not show any reducing test of aldehyde      [CPMT 1996; Orissa JEE 2004]
  A)
                  Sucrose                done clear
  B)
                  Fructose done clear
  C)
                  Maltose               done clear
  D)
                  Lactose done clear
  View Solution play_arrow

• question_answer94)
  When amylases catalyse the hydrolysis of starch, the final product obtained is chiefly     [Pb. PMT 1998]
  A)
                  Cellobiose           done clear
  B)
                  Glucose done clear
  C)
                  Maltose               done clear
  D)
                  Sucrose done clear
  View Solution play_arrow

• question_answer95)
  Galactose is converted into glucose in    [AFMC 1998]
  A)
                  Mouth  done clear
  B)
                  Stomach done clear
  C)
                  Liver      done clear
  D)
                  Intestine done clear
  View Solution play_arrow

• question_answer96)
  Which among the following is the simplest           [CPMT 1999]
  A)
                  Glucose                done clear
  B)
                  Cellulose done clear
  C)
                  Starch   done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer97)
  Indigestible carbohydrate, which is also a constituent of our diet, is                                         [Kerala (Med.) 1999]
  A)
                  Cellulose              done clear
  B)
                  Galactose done clear
  C)
                  Maltose               done clear
  D)
                  Starch done clear
  View Solution play_arrow

• question_answer98)
  Starch is converted into maltose by the [DPMT 1979; CPMT 1982; BHU 1999]
  A)
                  Maltase                done clear
  B)
                  Invertase done clear
  C)
                  Zymase                done clear
  D)
                  Diastase done clear
  View Solution play_arrow

• question_answer99)
  The disaccharide present in milk is [CPMT 1982, 87, 91; MP PET 2001]
  A)
                  Maltose               done clear
  B)
                  Lactose done clear
  C)
                  Sucrose                done clear
  D)
                  Cellobiose done clear
  View Solution play_arrow

• question_answer100)
  Carbohydrates are used by body mainly                [DCE 1999]
  A)
                  For obtaining vitamins done clear
  B)
                  As source of energy done clear
  C)
                  For all its developmental needs done clear
  D)
                  For building muscles done clear
  View Solution play_arrow

• question_answer101)
  In the viscose process the solvent for cellulose consists of [JIPMER 1999]
  A)
                  Ether and alcohol done clear
  B)
                  Copper sulphate and ammonia done clear
  C)
                  Sodium hydroxide and carbon disulphide done clear
  D)
                  Acetic acid and acetic anhydride done clear
  View Solution play_arrow

• question_answer102)
  Which of the following does not reduce Benedict's solution [KCET 2000]
  A)
                  Sucrose                done clear
  B)
                  Aldehyde done clear
  C)
                  Glucose                done clear
  D)
                  Fructose done clear
  View Solution play_arrow

• question_answer103)
  In polysaccharides the linkage connecting monosaccharide units is called                                              [MP PMT 2000]
  A)
                  Glycoside linkage             done clear
  B)
                  Nucleoside linkage done clear
  C)
                  Glycogen linkage              done clear
  D)
                  Peptide linkage done clear
  View Solution play_arrow

• question_answer104)
  Blood sugar is the same as           [DPMT 2000]
  A)
                  Glucose                done clear
  B)
                  Galactose done clear
  C)
                  Glycogen             done clear
  D)
                  Fructose done clear
  View Solution play_arrow

• question_answer105)
  Glucose has functional group     [MH CET 2000]
  A)
                  Aldehydic done clear
  B)
                  Aldehydic and alcoholic done clear
  C)
                  Alcoholic done clear
  D)
                  Ketonic and alcoholic done clear
  View Solution play_arrow

• question_answer106)
  Which of the following is an aldohexose [KCET (Engg.) 2001]
  A)
                  Cellulose              done clear
  B)
                  Sucrose done clear
  C)
                  Glucose                done clear
  D)
                  Raffinose done clear
  View Solution play_arrow

• question_answer107)
  The calorific value is maximum in case of [Kerala (Med.) 2000]
  A)
                  Milk       done clear
  B)
                  Proteins done clear
  C)
                  Minerals done clear
  D)
                  Carbohydrates done clear
  View Solution play_arrow

• question_answer108)
  An invert sugar is                                             [AFMC 2000]
  A)
                  Isorotatory         done clear
  B)
                  Dextrorotatory done clear
  C)
                  Laevorotatory   done clear
  D)
                  Optically inactive done clear
  View Solution play_arrow

• question_answer109)
  The change in optical rotation with time of freshly prepared solutions of sugar is known as           [JIPMER 2000]
  A)
                  Maturation         done clear
  B)
                  Rotatory motion done clear
  C)
                  Inversion             done clear
  D)
                  Specific rotation done clear
  View Solution play_arrow

• question_answer110)
  Yeast cell derive their energy from glucose by [AIIMS 2001]
  A)
                  Glycolysis            done clear
  B)
                  Respiration formation done clear
  C)
                  Formation           done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer111)
  Which of the following is correct statement [CBSE PMT 2001]
  A)
                  Troleins are amino acid done clear
  B)
                  a-hydrogen is present in fructose done clear
  C)
                  Starch is polymer of a-glucose done clear
  D)
                  Amylose is compound of cellulose done clear
  View Solution play_arrow

• question_answer112)
  Which of the following  is a aldohexose [KCET 2001]
  A)
                  Cellulose              done clear
  B)
                  Sucrose done clear
  C)
                  Galactose            done clear
  D)
                  Raffinose done clear
  View Solution play_arrow

• question_answer113)
  The ultimate product of the hydrolysis of starch is [DPMT 2001]
  A)
                  Fructose              done clear
  B)
                  Glucose done clear
  C)
                  Sucrose                done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer114)
  Raffinose is                                         [Pb. PMT 2001]
  A)
                  Trisaccharide      done clear
  B)
                  Monosaccharide done clear
  C)
                  Disaccharide       done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer115)
  A sugar, that is not a disaccharide, among the following is [KCET (Med./Engg.) 2002]
  A)
                  Lactose done clear
  B)
                  Galactose done clear
  C)
                  Sucrose                done clear
  D)
                  Maltose done clear
  View Solution play_arrow

• question_answer116)
  To detect the reducing and non reducing sugars, which of the following test is used        [MH CET 2002]
  A)
                  Molisch test       done clear
  B)
                  Biuret test done clear
  C)
                  Fehling's test     done clear
  D)
                  Millions test done clear
  View Solution play_arrow

• question_answer117)
  Which of the following is a disaccharide [MH CET 2002]
  A)
                  Glucose                done clear
  B)
                  Ribulose done clear
  C)
                  Lactose done clear
  D)
                  Arabinose done clear
  View Solution play_arrow

• question_answer118)
  On heating glucose with Fehling's solution we get a precipitate whose colour is  [CPMT 1979; CBSE PMT 1988; KCET 1992; DPMT 1983, 86; MP PMT 1996]
  A)
                  Yellow   done clear
  B)
                  Red done clear
  C)
                  Black      done clear
  D)
                  White done clear
  View Solution play_arrow

• question_answer119)
  Glycolysis is                                        [CBSE PMT 2003]
  A)
                  Conversion of glucose to haem done clear
  B)
                  Oxidation of glucose to glutamate done clear
  C)
                  Conversion of pyruvate to citrate done clear
  D)
                  Oxidation of glucose to pyruvate done clear
  View Solution play_arrow

• question_answer120)
  Which of the following is an example of ketohexose [Orissa JEE 2003]
  A)
                  Mannose             done clear
  B)
                  Galactose done clear
  C)
                  Maltose               done clear
  D)
                  Fructose done clear
  View Solution play_arrow

• question_answer121)
  The safest and the most common alternative of sugar is [MP PMT 2003]
  A)
                  Glucose                done clear
  B)
                  Aspartame done clear
  C)
                  Saccharin             done clear
  D)
                  Cyclodextrin done clear
  View Solution play_arrow

• question_answer122)
  The specific rotation of equilibrium mixture of a-D-glucose and b-D-glucose, is                                  [MP PMT 2003]
  A)
                  \[+{{19}^{o}}\]  done clear
  B)
                  \[+{{112}^{o}}\] done clear
  C)
                  \[+{{52}^{o}}\]  done clear
  D)
                  \[+{{100}^{o}}\] done clear
  View Solution play_arrow

• question_answer123)
  The charring of sugar, when treated with conc. \[{{H}_{2}}S{{O}_{4}},\] is due to                                               [Pb. CET 2002]
  A)
                  Oxidation            done clear
  B)
                  Reduction done clear
  C)
                  Dehydration       done clear
  D)
                  Hydrolysis done clear
  View Solution play_arrow

• question_answer124)
  Which among the following is the simplest sugar [Pb. CET 2002]
  A)
                  Glucose                done clear
  B)
                  Cellulose done clear
  C)
                  Starch   done clear
  D)
                  Glycogen done clear
  View Solution play_arrow

• question_answer125)
  Glucose and mannose are                                           [Orissa JEE 2004]
  A)
                  Epimers                done clear
  B)
                  Anomers done clear
  C)
                  Ketohexoses     done clear
  D)
                  Disaccharides done clear
  View Solution play_arrow

• question_answer126)
  On hydrolysis, which produces only glucose        [BVP 2004]
  A)
                  Galactose            done clear
  B)
                  Maltose done clear
  C)
                  Sucrose                done clear
  D)
                  None done clear
  View Solution play_arrow

• question_answer127)
  Pick out the one which does not belong to the family [KCET 2004]
  A)
                  Pepsin  done clear
  B)
                  Cellulose done clear
  C)
                  Ptyalin  done clear
  D)
                  Lipase done clear
  View Solution play_arrow

• question_answer128)
  Which of the following is the sweetest sugar [MP PMT 1997; CBSE PMT 1999; AIIMS 2000 Manipal MEE 1995; CPMT 1996; BHU 1997;]
  A)
                  Glucose                done clear
  B)
                  Fructose done clear
  C)
                  Lactose done clear
  D)
                  Sucrose done clear
  View Solution play_arrow

• question_answer129)
  Oxidation of glucose is one of the most important reactions in a living cell. What is the number of ATP molecules generated in cells from one molecule of glucose [CBSE PMT 1995]
  A)
                  38           done clear
  B)
                  12 done clear
  C)
                  18           done clear
  D)
                  28 done clear
  View Solution play_arrow

• question_answer130)
  Glucose has difference from fructose in that it   [BHU 2005]
  A)
                  Does not undergo hydrolysis done clear
  B)
                  Gives silver mirror with Tollen's reagent done clear
  C)
                  Monosaccharide done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer131)
  In fructose, the possible optical isomers are [Orissa JEE 2005]
  A)
                  12           done clear
  B)
                  8 done clear
  C)
                  16           done clear
  D)
                  4 done clear
  View Solution play_arrow

• question_answer132)
  If an aqueous solution of glucose is allowed to freeze than crystal of which will be separated out first     [DPMT 2005]
  A)
                  Glucose                done clear
  B)
                  Water done clear
  C)
                  Both of these    done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer133)
  Which is false     [J & K  2005]
  A)
                  Glucose is a disaccharide done clear
  B)
                  Starch is a polysaccharide done clear
  C)
                  Glucose and fructose are not anomers done clear
  D)
                  Invert sugar consists of glucose and fructose done clear
  View Solution play_arrow