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

done Proteins, Amino Acids and Enzymes Total Questions - 99

• question_answer1)
  Insulin is                                               [CBSE PMT 1991]
  A)
                  An amino acid    done clear
  B)
                  Protein done clear
  C)
                  A carbohydrate done clear
  D)
                  A lipid done clear
  View Solution play_arrow

• question_answer2)
  Peptides are
  A)
                  Esters    done clear
  B)
                  Salts done clear
  C)
                  Amides done clear
  D)
                  Ketones done clear
  View Solution play_arrow

• question_answer3)
  The proteins which are insoluble in water are
  A)
                  Fibrous proteins               done clear
  B)
                  Globular proteins done clear
  C)
                  Both A and B      done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer4)
  Irreversible precipitation of proteins is called
  A)
                  Denaturation     done clear
  B)
                  Hydrolysis done clear
  C)
                  Rearrangement                done clear
  D)
                  Electrophoresis done clear
  View Solution play_arrow

• question_answer5)
  The proteins with a prosthetic group are called
  A)
                  Pseudo proteins               done clear
  B)
                  Complex proteins done clear
  C)
                  Conjugated proteins      done clear
  D)
                  Polypeptides done clear
  View Solution play_arrow

• question_answer6)
  The prosthetic group of haemoglobin is
  A)
                  Porphin                done clear
  B)
                  Haem done clear
  C)
                  Globin   done clear
  D)
                  Globulin done clear
  View Solution play_arrow

• question_answer7)
  When collagen is boiled with water, it forms
  A)
                  Precipitate          done clear
  B)
                  Solution done clear
  C)
                  Gelatin done clear
  D)
                  Complex collagen done clear
  View Solution play_arrow

• question_answer8)
  Which of the following is not essential amino acid
  A)
                  Valine   done clear
  B)
                  Lysine done clear
  C)
                  Histidine              done clear
  D)
                  Glycine done clear
  View Solution play_arrow

• question_answer9)
  Amino acids are
  A)
                  Liquids done clear
  B)
                  Volatile solids done clear
  C)
                  Non-volatile crystalline compounds done clear
  D)
                  Mixture of amines and acids done clear
  View Solution play_arrow

• question_answer10)
  Isoelectric point is a
  A)
                  Specific temperature done clear
  B)
                  Suitable concentration of amino acid done clear
  C)
                  Hydrogen ion concentration that does not allow migration of amino acid under electric field done clear
  D)
                  Melting point of an amino acid under the influence of electric field done clear
  View Solution play_arrow

• question_answer11)
  Proteins are hydrolysed by enzymes into [CPMT 1981; BHU 1987; MP PMT 1994, 2002]
  A)
                  Dicarboxylic acids             done clear
  B)
                  Hydroxy acids done clear
  C)
                  Amino acids        done clear
  D)
                  Aromatic acids done clear
  View Solution play_arrow

• question_answer12)
  Proteins when heated with conc. \[HN{{O}_{3}}\] give a yellow colour. This is                                     [CPMT 1989]
  A)
                  Oxidising test     done clear
  B)
                  Xanthoprotic test done clear
  C)
                  Hoppe's test      done clear
  D)
                  Acid-base test done clear
  View Solution play_arrow

• question_answer13)
  Enzymes are      [DPMT 1980; MP PMT 1993, 96]
  A)
                  Proteins               done clear
  B)
                  Minerals done clear
  C)
                  Oils         done clear
  D)
                  Fatty acids done clear
  View Solution play_arrow

• question_answer14)
  Proteins are built up of [CPMT 1981, 99; BHU 1987; CBSE PMT 2001; MP PMT 1987, 96; KCET 1984]
  A)
                  Dicarboxylic acids             done clear
  B)
                  Amino acids done clear
  C)
                  Alcohols               done clear
  D)
                  Hydroxy acids done clear
  View Solution play_arrow

• question_answer15)
  The main structural feature of proteins is [MNR 1987; MP PET 1993, 97, 2004]
  A)
                  The ester linkage             done clear
  B)
                  The ether linkage done clear
  C)
                  The peptide linkage        done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer16)
  Pepsin enzyme hydrolyses [NCERT 1984; MP PET 1999; MP PMT 2001]
  A)
                  Proteins to amino acids done clear
  B)
                  Fats to fatty acids done clear
  C)
                  Glucose to ethyl alcohol done clear
  D)
                  Polysaccharides to monosaccharides done clear
  View Solution play_arrow

• question_answer17)
  Which one of the following proteins transports oxygen in the blood stream                                         [MP PMT 1993]
  A)
                  Myoglobin          done clear
  B)
                  Insulin done clear
  C)
                  Albumin               done clear
  D)
                  Haemoglobin done clear
  View Solution play_arrow

• question_answer18)
  Enzymes are                                      [MP PET 1993]
  A)
                  Living organisms done clear
  B)
                  Dead organisms done clear
  C)
                  Complex nitrogenous substances produced in living cells done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer19)
  Which is an essential constituent of diet                [AFMC 1980]
  A)
                  Starch   done clear
  B)
                  Glucose done clear
  C)
                  Carbohydrate    done clear
  D)
                  Protein done clear
  View Solution play_arrow

• question_answer20)
  Proteins can be used
  A)
                  As food                done clear
  B)
                  In textile done clear
  C)
                  As enzyme          done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer21)
  Which of the following foodstuffs contains nitrogen [DPMT 1986; MH CET 2002]
  A)
                  Carbohydrates done clear
  B)
                  Fats done clear
  C)
                  Proteins               done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer22)
  pH in stomach is approximately
  A)
                  7              done clear
  B)
                  2.0 done clear
  C)
                  6.5          done clear
  D)
                  10 done clear
  View Solution play_arrow

• question_answer23)
  The helical structure of proteins is established by [CPMT 1988]
  A)
                  Peptide bonds  done clear
  B)
                  Dipeptide bond done clear
  C)
                  Hydrogen bond                done clear
  D)
                  Vander Waal's forces done clear
  View Solution play_arrow

• question_answer24)
  Natural silk is a
  A)
                  Polyester             done clear
  B)
                  Polyamide done clear
  C)
                  Polyacid               done clear
  D)
                  Polysaccharide done clear
  View Solution play_arrow

• question_answer25)
  Protein contains               [CPMT 1975; MP PMT 2002]
  A)
                  \[C,\,\,H,\,\,O\] and N done clear
  B)
                  Only C and H done clear
  C)
                  \[Cl,\,\,H\] and \[O\]      done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer26)
  The end product of protein digestion is [CPMT 1981; KCET 1984]
  A)
                  Amino acid          done clear
  B)
                  Glucose done clear
  C)
                  Glycerol               done clear
  D)
                  Oxalic acid done clear
  View Solution play_arrow

• question_answer27)
  Protein can be most easily removed from            [MNR 1988]
  A)
                  Alkanes                done clear
  B)
                  Alkenes done clear
  C)
                  Alkynes                done clear
  D)
                  Benzene done clear
  View Solution play_arrow

• question_answer28)
  Which of the following contains the highest percentage of protein                                           [CPMT 1984]
  A)
                  Groundnut         done clear
  B)
                  Cow's milk done clear
  C)
                  Egg         done clear
  D)
                  Wheat done clear
  View Solution play_arrow

• question_answer29)
  The enzyme ptylin used for the digestion of  food is present in  [CPMT 1981; Pb. PMT 2004]
  A)
                  Saliva     done clear
  B)
                  Blood done clear
  C)
                  Intestines            done clear
  D)
                  Adrenal glands done clear
  View Solution play_arrow

• question_answer30)
  Which one of the following is an amino acid         [KCET 1984]
  A)
                  \[C{{H}_{3}}CON{{H}_{2}}\]         done clear
  B)
                  \[C{{H}_{3}}CONHC{{H}_{3}}\] done clear
  C)
                  \[C{{H}_{3}}NHCHO\]     done clear
  D)
                  \[N{{H}_{2}}C{{H}_{2}}.COOH\] done clear
  View Solution play_arrow

• question_answer31)
  Biuret test is used for the detection of   [KCET 1993]
  A)
                  Saturated oils    done clear
  B)
                  Sugars done clear
  C)
                  Proteins               done clear
  D)
                  Fats done clear
  View Solution play_arrow

• question_answer32)
  Out of the following the best category of proteins is [SCRA 1991]
  A)
                  Polyamides         done clear
  B)
                  Polythioethers done clear
  C)
                  Glycerides           done clear
  D)
                  Polysaccharides done clear
  View Solution play_arrow

• question_answer33)
  The molecular weight of protein is           [KCET 1984]
  A)
                  < 10000 done clear
  B)
                  > 10000 done clear
  C)
                  > 1000   done clear
  D)
                  > 1000 and < 10000 done clear
  View Solution play_arrow

• question_answer34)
  Which of the following is not a classification of proteins [KCET 1984]
  A)
                  Enzymes              done clear
  B)
                  Antibodies done clear
  C)
                  Antigens              done clear
  D)
                  Hormones done clear
  View Solution play_arrow

• question_answer35)
  The protein that is a structural material is              [KCET 1984]
  A)
                  Albumin               done clear
  B)
                  Oxytocin done clear
  C)
                  Haemoglobin     done clear
  D)
                  Keratin done clear
  View Solution play_arrow

• question_answer36)
  For \[\alpha -\]amino acids having the structure                 \[R-\underset{N{{H}_{2}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,C{{O}_{2}}H\]                 Which of the following statements are true                                 Water solubility is maximum at a pH when concentrations of anions and cations are equal                                 They give ninhydrin test                                               On reacting with nitrous acid give off \[{{N}_{2}}\] [MP PET 1994]
  A)
                  All           done clear
  B)
                  B and C done clear
  C)
                  A and B done clear
  D)
                  A done clear
  View Solution play_arrow

• question_answer37)
  Which of the following reacts with haemoglobin in the blood to form carboxyhaemoglobin          [Manipal MEE 1995]
  A)
                  CO          done clear
  B)
                  \[C{{O}_{2}}\] done clear
  C)
                  HCOOH done clear
  D)
                  \[{{H}_{2}}C{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer38)
  Secondary structure of a protein refers to            [CBSE PMT 1995]
  A)
                  Mainly denatured proteins and structures of prosthetic groups done clear
  B)
                  Three dimensional structure, specially the bond between amino acid residues that are distant from each other in the polypeptide chain done clear
  C)
                  Linear sequence of amino acid residues in the polypeptide chain done clear
  D)
                  Regular folding patterns of continuous portions of the polypeptide chain done clear
  View Solution play_arrow

• question_answer39)
  Of the following statements about enzymes which ones are true (i)            Enzymes lack in nucleophilic groups (ii)           Enzymes are highly specific both in binding chiral substrates and in catalyzing their zeactions (iii)          Enzymes catalyse chemical reactions by lowering the activation energy (iv)         Pepsin is a proteolytic enzyme                   [CBSE PMT 1995]
  A)
                  (i) and (iv)           done clear
  B)
                  (i) and (iii) done clear
  C)
                  (ii), (iii) and (iv)  done clear
  D)
                  (i) done clear
  View Solution play_arrow

• question_answer40)
  Proteins are composed of            [MP PMT 1995; J & K 2005]
  A)
                  \[\alpha -\]amino acids done clear
  B)
                  Carbohydrates done clear
  C)
                  Vitamins              done clear
  D)
                  Mineral salts done clear
  View Solution play_arrow

• question_answer41)
  Read the following statements carefully                                 Albumin is a simple protein                                 The amino acid alanine contains an acidic side chain                                 Insulin is a hormone                                 Muscles contain the protein keratin                 Point out the wrong statements in the above set of statements
  A)
                  A, B        done clear
  B)
                  C, D done clear
  C)
                  A, C        done clear
  D)
                  B, D done clear
  View Solution play_arrow

• question_answer42)
  Enzymes in the living systems    [ CPMT 1999; AIIMS 2000; CBSE PMT 1997; MP PET 1999;]
  A)
                  Provide energy done clear
  B)
                  Provide immunity done clear
  C)
                  Transport oxygen done clear
  D)
                  Catalyse biological processes done clear
  View Solution play_arrow

• question_answer43)
  Which of the following statements about proteins is not true     [MP PET 2001]
  A)
                  Amino acid residues join together to make a protein molecule done clear
  B)
                  Proteins are polymers with formula \[{{({{C}_{6}}{{H}_{10}}{{O}_{5}})}_{n}}\] done clear
  C)
                  Eggs are rich in protein done clear
  D)
                  Pulses are good source of proteins done clear
  View Solution play_arrow

• question_answer44)
  Enzymes                                              [AIIMS 1996]
  A)
                  Accelerate biochemical reactions done clear
  B)
                  Have optimum activity at body temperature done clear
  C)
                  Consist of amino acids done clear
  D)
                  Have all these properties done clear
  View Solution play_arrow

• question_answer45)
  The functional group which is found in amino acid is [AFMC 1998; AIEEE 2002]
  A)
                  \[-COOH\] group              done clear
  B)
                  \[-N{{H}_{2}}\] group done clear
  C)
                  \[-C{{H}_{3}}\] group     done clear
  D)
                  Both A and B done clear
  View Solution play_arrow

• question_answer46)
  Amino acids are produced on hydrolysis of          [AIIMS 1996]
  A)
                  Nucleic acid        done clear
  B)
                  Carbohydrates done clear
  C)
                  Fats        done clear
  D)
                  Proteins done clear
  View Solution play_arrow

• question_answer47)
  Enzymes belong to which class of compounds [KCET 1996]
  A)
                  Polysaccharides done clear
  B)
                  Polypeptides done clear
  C)
                  Polynitrogen heterocyclic compounds done clear
  D)
                  Hydrocarbons done clear
  View Solution play_arrow

• question_answer48)
  By the action of enzymes, the rate of biochemical reaction [CBSE PMT 1994]
  A)
                  Decreases           done clear
  B)
                  Increases done clear
  C)
                  Does not change              done clear
  D)
                  Either A or C done clear
  View Solution play_arrow

• question_answer49)
  Metal present in blood is              [CPMT 1997]
  A)
                  Al done clear
  B)
                  Mg done clear
  C)
                  Cu           done clear
  D)
                  Fe done clear
  View Solution play_arrow

• question_answer50)
  Which compound can exist in a dipolar (zwitter ion) state [Pb. PMT 1998]
  A)
                  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}CH(N=C{{H}_{2}})COOH\] done clear
  B)
                  \[{{(C{{H}_{3}})}_{2}}CH.CH(N{{H}_{2}})COOH\] done clear
  C)
                  \[{{C}_{6}}{{H}_{5}}CONHC{{H}_{2}}COOH\] done clear
  D)
                  \[HOOC.C{{H}_{2}}C{{H}_{2}}COCOOH\] done clear
  View Solution play_arrow

• question_answer51)
  What is the monomer of polypeptide [KCET 1998; JIPMER 1999; Pb. CET 2002]
  A)
                  Amino acid          done clear
  B)
                  Glucose done clear
  C)
                  Nucleoside         done clear
  D)
                  Nucleotide done clear
  View Solution play_arrow

• question_answer52)
  Which of the following enzymes is not useful in the digestion of proteins                                              [KCET 1998]
  A)
                  Chymotrypsin    done clear
  B)
                  Pepsin done clear
  C)
                  Trypsin done clear
  D)
                  Lipase done clear
  View Solution play_arrow

• question_answer53)
  Haemoglobin is [CBSE PMT 1997; BHU 2004]
  A)
                  An enzyme         done clear
  B)
                  A globular protein done clear
  C)
                  A vitamin             done clear
  D)
                  A carbohydrate done clear
  View Solution play_arrow

• question_answer54)
  Albumin proteins are most abundant in [BHU 1998]
  A)
                  Meat     done clear
  B)
                  Milk done clear
  C)
                  Egg         done clear
  D)
                  Soyabean done clear
  View Solution play_arrow

• question_answer55)
  Dialysis can separate      [BHU 1998]
  A)
                  Glucose and fructose done clear
  B)
                  Glucose and sucrose done clear
  C)
                  Glucose and NaCl done clear
  D)
                  Glucose and proteins done clear
  View Solution play_arrow

• question_answer56)
  Which one of the following is an example of a globular protein                                   [Orissa JEE 1997]
  A)
                  Keratin done clear
  B)
                  Insulin done clear
  C)
                  Collagen               done clear
  D)
                  Myoglobin done clear
  View Solution play_arrow

• question_answer57)
  Leucine amino acids is the            [Pb. PMT 1999]
  A)
                  Essential              done clear
  B)
                  Non-essential  done clear
  C)
                  Aromatic              done clear
  D)
                  Basic done clear
  View Solution play_arrow

• question_answer58)
  Which of the following tests is not used for testing proteins [Kerala PMT 1999; KCET 1999]
  A)
                  Millon's test       done clear
  B)
                  Molisch's test done clear
  C)
                  Biuret test           done clear
  D)
                  Ninhydrin test done clear
  View Solution play_arrow

• question_answer59)
  Amino acids usually exist in the form of Zwitter ions. This means that it consists of            [KCET 2000]
  A)
                  The basic group \[N{{H}_{2}}\] and the acidic group \[-COOH\] done clear
  B)
                  The basic group \[-NH_{3}^{+}\] and the acidic group \[-C{{O}_{2}}\] done clear
  C)
                  The basic group \[-CO_{2}^{-}\] and the acidic group \[NH_{3}^{+}\] done clear
  D)
                  No acidic or basic group done clear
  View Solution play_arrow

• question_answer60)
  The most important energy carrier in all the living cells is [MP PET 2000; KCET 2000]
  A)
                  AMP      done clear
  B)
                  ATP done clear
  C)
                  ADP       done clear
  D)
                  UDP done clear
  View Solution play_arrow

• question_answer61)
  The 10% energy transfer law of food chain was given by [BHU 2000]
  A)
                  Stanley done clear
  B)
                  Weismann done clear
  C)
                  Lindemann         done clear
  D)
                  Tansley done clear
  View Solution play_arrow

• question_answer62)
  Which of the following is a conjugated protein   [BHU 2000]
  A)
                  Glycoprotein      done clear
  B)
                  Phosphoprotein done clear
  C)
                  Chromoprotein done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer63)
  The number of essential amino acids in man is [CBSE PMT 2000]
  A)
                  8              done clear
  B)
                  10 done clear
  C)
                  18           done clear
  D)
                  20 done clear
  View Solution play_arrow

• question_answer64)
  Pick out wrong combination        [DCE 2000]
  A)
                  \[F{{e}^{+2}}\to \] Haemoglobin done clear
  B)
                  \[M{{g}^{2+}}\to \] Photosynthesis done clear
  C)
                  \[S{{e}^{2+}}\to \] Kreb Cycle done clear
  D)
                  \[C{{O}^{+2}}\to \] Vitamin B-12 done clear
  View Solution play_arrow

• question_answer65)
  The decomposition of complex organic compounds into simpler compound with the help of enzyme is known as [Pb. PMT 2000]
  A)
                  Catabolism          done clear
  B)
                  Anabolism done clear
  C)
                  Fermentation    done clear
  D)
                  Metabolism done clear
  View Solution play_arrow

• question_answer66)
  A biological catalyst is essentially [Pb. PMT 2000; BHU 2004]
  A)
                  A carbohydrates               done clear
  B)
                  An amino acids done clear
  C)
                  A nitrogen molecule       done clear
  D)
                  Fats done clear
  View Solution play_arrow

• question_answer67)
  The test used for identifying peptide linkage in proteins is [KCET (Engg.) 2001]
  A)
                  Borsche's test done clear
  B)
                  Molisch's test done clear
  C)
                  Ninhydrin test   done clear
  D)
                  Biuret test done clear
  View Solution play_arrow

• question_answer68)
  Which of the following is not a function of proteins [MP PMT 2001]
  A)
                  Nails formation done clear
  B)
                  Skin formation done clear
  C)
                  Muscle formation done clear
  D)
                  Providing energy for metabolism done clear
  View Solution play_arrow

• question_answer69)
  The helical structure of proteins is stabilized by [MP PMT 2001]
  A)
                  Peptide bonds done clear
  B)
                  Dipeptide bond done clear
  C)
                  Hydrogen bond                done clear
  D)
                  Vander Waal's forces done clear
  View Solution play_arrow

• question_answer70)
  The optically inactive amino acid is [MP PMT 2001; BHU 2005]
  A)
                  Lysine   done clear
  B)
                  Glycine done clear
  C)
                  Arginine               done clear
  D)
                  Alanine done clear
  View Solution play_arrow

• question_answer71)
  Which a amino acid can cross link peptide chains [AIIMS 2001]
  A)
                  Serine   done clear
  B)
                  Cysteine done clear
  C)
                  Glutamine           done clear
  D)
                  Tyrosine done clear
  View Solution play_arrow

• question_answer72)
  Amino acids are the building blocks of    [MH CET 2001]
  A)
                  Fat          done clear
  B)
                  Vitamin done clear
  C)
                  Protein                 done clear
  D)
                  Carbohydrate done clear
  View Solution play_arrow

• question_answer73)
  Which of the following protein destroys the antigen when it enters in body cell [AIIMS 2001; Pb. PMT 2004 ]
  A)
                  Antibodies          done clear
  B)
                  Insulin done clear
  C)
                  Chromoprotein                 done clear
  D)
                  Phosphoprotein done clear
  View Solution play_arrow

• question_answer74)
  An antibiotic with a broad spectrum        [AFMC 2001]
  A)
                  Kills the antibodies done clear
  B)
                  Acts on a specific antigen done clear
  C)
                  Acts on different antigents done clear
  D)
                  Acts on both the antigens and antibodies done clear
  View Solution play_arrow

• question_answer75)
  Antibodies are                                  [CBSE PMT 2001]
  A)
                  Carbohydrate    done clear
  B)
                  Globular protein done clear
  C)
                  Immunoglobulins             done clear
  D)
                  Cellulose compounds done clear
  View Solution play_arrow

• question_answer76)
  Excess of \[N{{a}^{+}}\] ions in our system causes            [BHU 2001]
  A)
                  High B.P.              done clear
  B)
                  Low B.P. done clear
  C)
                  Diabetes              done clear
  D)
                  Anaemia done clear
  View Solution play_arrow

• question_answer77)
  The example of a protein is         [MP PET 2003]
  A)
                  Narvone              done clear
  B)
                  Lacithin done clear
  C)
                  Cellulose              done clear
  D)
                  Insulin done clear
  View Solution play_arrow

• question_answer78)
  Enzymes are made up of              [CBSE PMT 2002]
  A)
                  Carbohydrates done clear
  B)
                  Edible proteins done clear
  C)
                  Nitrogen containing carbohydrates done clear
  D)
                  Proteins with specific structure done clear
  View Solution play_arrow

• question_answer79)
  Chlorophyll contains       [RPMT 2002]
  A)
                  \[Fe\]    done clear
  B)
                  \[Na\] done clear
  C)
                  \[Mg\]  done clear
  D)
                  \[Zn\] done clear
  View Solution play_arrow

• question_answer80)
  Which one of the following biomolecules is insoluble in water    [AIIMS 2005]
  A)
                  a- Keratin           done clear
  B)
                  Haemoglobin done clear
  C)
                  Ribonuclease     done clear
  D)
                  Adenine done clear
  View Solution play_arrow

• question_answer81)
  A nanopeptide contains ??.. peptide linkages   [KCET 2005]
  A)
                  10           done clear
  B)
                  8 done clear
  C)
                  9              done clear
  D)
                  18 done clear
  View Solution play_arrow

• question_answer82)
  Identify the incorrect statement               [Kerala (Med.) 2003]
  A)
                  An octa deca peptide contains 18 amino acid residues and 17 peptide bonds done clear
  B)
                  Addition of an inert gas into a system in thermodynamic equilibrium for the dissociation of \[PC{{l}_{5}}\] shifts the equilibrium to the left. done clear
  C)
                  When gold dissolves in aquaregia the complex formed is chloroauric acid done clear
  D)
                  In the extraction of aluminium purified bauxite is dissolved in molten fluorospar done clear
  E)
                  If the pH value of a solution is to be decreased from 5 to 3, the hydrogen ion concentration must be increased twice the initial value. done clear
  View Solution play_arrow

• question_answer83)
  a-helix is found in                           [Kerala (Engg.) 2002]
  A)
                  DNA       done clear
  B)
                  RNA done clear
  C)
                  Lipid       done clear
  D)
                  Protein done clear
  View Solution play_arrow

• question_answer84)
  The main structural of protein is                [UPSEAT 2000, 02]
  A)
                  The ester linkage             done clear
  B)
                  The ether linkage done clear
  C)
                  The peptide linkage        done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer85)
  Among the following, the achiral amino acid is [AIIMS 2003]
  A)
                  2-Ethylalanine done clear
  B)
                  2-Methylglycine done clear
  C)
                  2-Hydroxymethyl serine done clear
  D)
                  Tryptophan done clear
  View Solution play_arrow

• question_answer86)
  Which of the following could act as a propellant or rockets [CBSE PMT 2003]
  A)
                  Liquid hydrogen + liquid nitrogen done clear
  B)
                  Liquid oxygen + liquid argon done clear
  C)
                  Liquid hydrogen + liquid oxygen done clear
  D)
                  Liquid nitrogen +liquid oxygen done clear
  View Solution play_arrow

• question_answer87)
  Which amino acid has aromatic ring         [CPMT 2003]
  A)
                  Alamine               done clear
  B)
                  Glycine done clear
  C)
                  Tyrosine               done clear
  D)
                  Lysine done clear
  View Solution play_arrow

• question_answer88)
  The pH value of the solution in which a particular amino acid does not migrate under the influence of an electric field in called the            [Kerala (Med.) 2003]
  A)
                  Eutectic point    done clear
  B)
                  Yielding point done clear
  C)
                  Neutralisation point        done clear
  D)
                  Effusion done clear
  E)
                  Isoelectric point done clear
  View Solution play_arrow

• question_answer89)
  Which part of the protein molecule is responsible for function and activity of the proteins            [AMU 2002]
  A)
                  Secondary structure       done clear
  B)
                  Peptide bond done clear
  C)
                  Primary structure             done clear
  D)
                  Binding sites done clear
  View Solution play_arrow

• question_answer90)
  The Structural formula of an amino acid, isoleucine is [MP PMT 2003]
  A)
                  \[C{{H}_{3}}-\overset{N{{H}_{2}}\,}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH.C}}\,}}\,OOH\] done clear
  B)
                  done clear
  C)
                  done clear
  D)
                  done clear
  View Solution play_arrow

• question_answer91)
  The process by which synthesis of protein takes place based on the genetic information present in m-RNA is called [KCET 2003; Kerala CET 2005]
  A)
                  Translation          done clear
  B)
                  Transcription done clear
  C)
                  Replication          done clear
  D)
                  Messenger hypothesis done clear
  View Solution play_arrow

• question_answer92)
  Which of the following is used in our body as a fuel for muscles and nerves and to build and repair body tissues?                                                                                                 [DCE 2003]
  A)
                  Cane sugar          done clear
  B)
                  Fructose done clear
  C)
                  Proteins               done clear
  D)
                  Glucose done clear
  View Solution play_arrow

• question_answer93)
  Which enzyme convert glucose into alcohol [Pb. CET 2003]
  A)
                  Invertase             done clear
  B)
                  Zymase done clear
  C)
                  Maltase done clear
  D)
                  Diastase done clear
  View Solution play_arrow

• question_answer94)
  Which one of the following structures represents the peptide chain        [CBSE PMT 2004; CPMT 2003; DCE 2002; MP PET 1994; Bihar MEE 1997; Orissa JEE 1997]
  A)
                  \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\] done clear
  B)
                  \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\] done clear
  C)
                  \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-NH-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-NH-\] done clear
  D)
                  \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\] done clear
  View Solution play_arrow

• question_answer95)
  The correct statement in respect of protein haemoglobin is that it                                            [CBSE PMT 2004]
  A)
                  Acts as an oxygen carrier in the blood done clear
  B)
                  Forms antibodies and offers resistance to diseases done clear
  C)
                  Functions as a catalyst for biological reactions done clear
  D)
                  Maintains blood sugar level done clear
  View Solution play_arrow

• question_answer96)
  Identify the correct statement regarding enzymes [AIEEE 2004]
  A)
                  Enzymes are specific biological catalysts that cannot be poisoned done clear
  B)
                  Enzymes are normally heterogeneous catalysts that are very specific in their action done clear
  C)
                  Enzymes are specific biological catalysts that can normally function at very high temperature (T ~ 1000K) done clear
  D)
                  Enzymes are specific biological catalysts that possess well-defined active sites done clear
  View Solution play_arrow

• question_answer97)
  A biological catalyst is essentially                               [BHU 2004]
  A)
                  An enzyme done clear
  B)
                  A carbohydrate done clear
  C)
                  An amino acid done clear
  D)
                  A nitrogen compound done clear
  View Solution play_arrow

• question_answer98)
  Which synthesis was done by Stainley Millar       [CPMT 1979]
  A)
                  Amino acid          done clear
  B)
                  Protein done clear
  C)
                  Virus      done clear
  D)
                  Vitamin done clear
  View Solution play_arrow

• question_answer99)
  The bond that determines the secondary structure of proteins is or secondary structure of protein is due to [NCERT 1984; MP PET 1996; MP PMT 1997]
  A)
                  Coordinate bond done clear
  B)
                  Covalent bond done clear
  C)
                  Hydrogen bond done clear
  D)
                  Peptide bond done clear
  View Solution play_arrow