NEET Biology Biomolecules / जैव-अणु Question Bank

done Nucleotides and Nucleic acid Total Questions - 45

• question_answer1)
  A ribose (but not deoxyribose) nucleotide is [CPMT 1987; Kerala PMT 2004]
  A)
  Cytosine - pentose sugar - phosphate done clear
  B)
  Guanine - pentose sugar - phosphate done clear
  C)
  Thymine - pentose sugar - phosphate done clear
  D)
  Uracil - pentose sugar - phosphate done clear
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• question_answer2)
  DNA is present in [MP PMT 1995, 98; BVP 2000; RPMT 2001; MHCET 2001]
  A)
  Nucleus only done clear
  B)
  Mitochondrion only done clear
  C)
  Chloroplast only done clear
  D)
  All the above done clear
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• question_answer3)
  Which one of the following pairs is not correctly matched  [MP PMT 1993]
  A)
  Recombinant DNA DNA formed by the joining of segments of DNA from different sources done clear
  B)
  Purine Nitrogenous bases Cytosine, thymine and uracil done clear
  C)
  ATP The principal energy carrying compound in the cell done clear
  D)
  r-RNA RNA molecules found in ribosomes done clear
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• question_answer4)
  Hydrolysis of nucleic acid yields [AMU 1988]
  A)
  Only sugar done clear
  B)
  Phosphoric acid only done clear
  C)
  Nitrogenous base only done clear
  D)
  All the above done clear
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• question_answer5)
  DNA differs from RNA [BHU 2003]
  A)
  In the nature of sugar alone done clear
  B)
  In the nature of purines alone done clear
  C)
  In the nature of sugar and pyrimidines done clear
  D)
  None of the above done clear
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• question_answer6)
  Which of the following is a purine [MP PMT 1999]
  A)
  Prokaryotes done clear
  B)
  Guanine done clear
  C)
  Thymine done clear
  D)
  Uracil done clear
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• question_answer7)
  ATP is [Orissa PMT 2002]
  A)
  Adenosine D-ribose three phosphate done clear
  B)
  Adenosine L-ribose three phosphate done clear
  C)
  Adenine D-ribose three phosphate done clear
  D)
  Adenine L-ribose three phosphate done clear
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• question_answer8)
  ATP is [BVP 2002]
  A)
  Nucleotide done clear
  B)
  Nucleoside done clear
  C)
  Nucleic acid done clear
  D)
  Hormone done clear
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• question_answer9)
  Thymine is a [DPMT 1991]
  A)
  Enzyme done clear
  B)
  Vitamin done clear
  C)
  Pyrimidine done clear
  D)
  Purine done clear
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• question_answer10)
  Who proved that DNA is a genetic material
  A)
  Jacob and Monad done clear
  B)
  Avery, Mcleod and McCarthy done clear
  C)
  Griffith done clear
  D)
  Harshey and Chase done clear
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• question_answer11)
  DNA is concentrated in [CPMT 1979, 86]
  A)
  Chromatin as DNA protein complex done clear
  B)
  Ribosomes done clear
  C)
  Golgi bodies done clear
  D)
  Plastids done clear
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• question_answer12)
  Strands of DNA are bonded by  [CPMT 1980; AIIMS 1989; Bihar MDAT 1992]
  A)
  Hydrogen done clear
  B)
  Carbon done clear
  C)
  Oxygen done clear
  D)
  Nitrogen done clear
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• question_answer13)
  RNA contains [KCET 1994; BVP 2000; CPMT 2003]
  A)
  Hexose sugar done clear
  B)
  Deoxyribose sugar done clear
  C)
  Dextrose sugar done clear
  D)
  Ribose sugar done clear
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• question_answer14)
  A DNA strand is directly involved in the synthesis of following except
  A)
  Another DNA done clear
  B)
  Protein synthesis done clear
  C)
  tRNA molecule done clear
  D)
  mRNA molecule done clear
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• question_answer15)
  In DNA guanine pairs with [CPMT 1980; AFMC 1988]
  A)
  Cytosine done clear
  B)
  Thymine done clear
  C)
  Uracil done clear
  D)
  Adenine done clear
  View Solution play_arrow

• question_answer16)
  DNA is not present in one of the following  [DPMT 1983; MP PMT 2003]
  A)
  Mitochondria done clear
  B)
  Chloroplast done clear
  C)
  Bacteriophage done clear
  D)
  Tobacco mosaic virus done clear
  View Solution play_arrow

• question_answer17)
  DNA strands are antiparallel because of the presence of  [Kerala PMT 2004]
  A)
  H-bonds done clear
  B)
  Peptide bonds done clear
  C)
  Disulfied bonds done clear
  D)
  Phosphate-diester bonds None of the above done clear
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• question_answer18)
  Pyrimidines are
  A)
  Single ring compounds done clear
  B)
  Double ring compounds done clear
  C)
  Three ring compounds done clear
  D)
  None of the above done clear
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• question_answer19)
  The function of histone proteins of nuclei is
  A)
  To provide amino acids for enzyme synthesis done clear
  B)
  To provide structural proteins for stabilising chromosome structure done clear
  C)
  To neutralise anionic charges of inter nucleotide phosphate in DNA done clear
  D)
  Both (b) and (c) done clear
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• question_answer20)
  Nucleic acids were discovered by [MP PMT 1999]
  A)
  Watson and Crick done clear
  B)
  Khorana done clear
  C)
  Wilkins done clear
  D)
  Miescher done clear
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• question_answer21)
  In DNA molecule, which of the following base pair is present [MP PMT 1992; CPMT 1991; BHU 1980]
  A)
  Cytosine and adenine done clear
  B)
  Adenine and thymine done clear
  C)
  Adenine and guanine done clear
  D)
  Cytosine and thymine done clear
  View Solution play_arrow

• question_answer22)
  DNA is not found in [CPMT 1987]
  A)
  Chromatin done clear
  B)
  Nucleus done clear
  C)
  Nucleolus done clear
  D)
  Cytoplasm done clear
  View Solution play_arrow

• question_answer23)
  The transformation experiments on Pneumococcus showed that [CPMT 1988]
  A)
  DNA can duplicate itself done clear
  B)
  RNA is the genetic material done clear
  C)
  DNA is the genetic material done clear
  D)
  None of these done clear
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• question_answer24)
  The base pairs of DNA are correctly shown as [Bihar MDAT 1995; RPMT 1997; BHU 1998, 99, 2004; BVP 2000; MHCET 2003]
  A)
  A - T and C = G done clear
  B)
  A = T and C = G done clear
  C)
  A = T and C - G done clear
  D)
  A - T and C - G done clear
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• question_answer25)
  Pentose sugar present in nucleic acid is
  A)
  Ribulose done clear
  B)
  Ribose done clear
  C)
  Raffinose done clear
  D)
  Xylulose done clear
  View Solution play_arrow

• question_answer26)
  Purines are
  A)
  Single ring compounds done clear
  B)
  Double ring compounds done clear
  C)
  Straight chain compounds done clear
  D)
  None of the above done clear
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• question_answer27)
  DNA is [CPMT 1980]
  A)
  Always double stranded done clear
  B)
  Rarely single stranded done clear
  C)
  Always single stranded done clear
  D)
  Rarely double stranded done clear
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• question_answer28)
  Which of the following is capable of self-replication [CPMT 1988]
  A)
  An enzyme done clear
  B)
  A carbohydrate molecule done clear
  C)
  A water molecule done clear
  D)
  A nucleic acid done clear
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• question_answer29)
  DNA was first discovered by [CPMT 1979, 94; BHU 1985]
  A)
  Beadle and Tatum done clear
  B)
  Watson and Crick done clear
  C)
  Friedrich Miescher done clear
  D)
  Kornberg done clear
  View Solution play_arrow

• question_answer30)
  Ultraviolet light absorbed by nucleic acid is [RPMT 2000]
  A)
  26 nm done clear
  B)
  75 nm done clear
  C)
  260 nm done clear
  D)
  1500 nm done clear
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• question_answer31)
  The length of DNA having 23 base pairs is  [Kerala PMT 2004]
  A)
  \[\text{70}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  B)
  \[\text{78}\text{.4}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  C)
  \[\text{78}\text{.2}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  D)
  \[\text{74}\text{.8}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  E)
  \[\text{74}\text{.2}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  View Solution play_arrow

• question_answer32)
  The nucleic acid base having two possible binding sites is  [AIIMS 2004]
  A)
  Thymine done clear
  B)
  Cytosine done clear
  C)
  Guanine done clear
  D)
  Adenine done clear
  View Solution play_arrow

• question_answer33)
  Five nitrogen atoms are present in the ring of
  A)
  Uracil done clear
  B)
  Guanine done clear
  C)
  Cytosine done clear
  D)
  Thymine done clear
  View Solution play_arrow

• question_answer34)
  The strongest evidence that DNA is genetic material comes from
  A)
  That chromosomes are made up of DNA done clear
  B)
  Transformation of bacterial cells done clear
  C)
  That DNA is not present in the cytoplasm done clear
  D)
  That DNA is present in the nucleus done clear
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• question_answer35)
  The distance between two nucleotides in DNA helix is
  A)
  \[\text{5}\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  B)
  \[\text{3}\text{.4}\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  C)
  \[\text{3}\text{.9}\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  D)
  \[30\overset{o}{\mathop{A}}\,\] done clear
  View Solution play_arrow

• question_answer36)
  A nucleoside differs from a nucleotide in not having [MP PMT 1998; BVP 2002]
  A)
  Phosphate done clear
  B)
  Sugar done clear
  C)
  Phosphate and sugar done clear
  D)
  Nitrogen base done clear
  View Solution play_arrow

• question_answer37)
  How many nucleotides are present in one turn of DNA helix [MP PMT 1999, 2000; Haryana PMT 2005]
  A)
  4 pairs done clear
  B)
  8 pairs done clear
  C)
  10 pairs done clear
  D)
  9 pairs done clear
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• question_answer38)
  The similarity between DNA and RNA is that both are [KCET 1999]
  A)
  Double stranded done clear
  B)
  Having similar sugars done clear
  C)
  Polymers of nucleotides done clear
  D)
  Having similar pyrimidines done clear
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• question_answer39)
  DNA is a polymer of [CPMT 1998; BVP 2000]
  A)
  Nucleotide done clear
  B)
  Nucleoside done clear
  C)
  Amino acids done clear
  D)
  All of the above done clear
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• question_answer40)
  How many types of nucleotides are commonly found
  A)
  One done clear
  B)
  Two done clear
  C)
  Three done clear
  D)
  Four done clear
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• question_answer41)
  Nucleoside is made up of [BHU 1995; Pb. PMT 2004]
  A)
  Sugar only done clear
  B)
  Phosphate only done clear
  C)
  Sugar and phosphate done clear
  D)
  Sugar and base done clear
  View Solution play_arrow

• question_answer42)
  Which of the cell organelles are devoid of deoxy ribonucleic acid [RPMT 1997]
  A)
  Mitochondria and nucleus done clear
  B)
  Chloroplast and mitochondria done clear
  C)
  Nucleus and chloroplast done clear
  D)
  Lysosome and dictyosome done clear
  View Solution play_arrow

• question_answer43)
  Which one of the following is widely distributed in a cell [CPMT 1977; MHCET 2000]
  A)
  DNA done clear
  B)
  RNA done clear
  C)
  Chloroplast done clear
  D)
  Chromoplast done clear
  View Solution play_arrow

• question_answer44)
  RNA is absent in  [BHU 1980; MP PMT 1986; MHCET 2003]
  A)
  Plasmalemma done clear
  B)
  Cytoplasm done clear
  C)
  Chromosomes done clear
  D)
  Ribosomes done clear
  View Solution play_arrow

• question_answer45)
  Which of the following bases is present in RNA in place of thymine [CPMT 1986; Orissa JEE 2004]
  A)
  Uracil done clear
  B)
  Adenine done clear
  C)
  Guanine done clear
  D)
  Water done clear
  View Solution play_arrow