Nucleic Acids MCQ

Test your knowledge with important Nucleic Acids MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Nucleic Acids MCQs at Bissoy

• A purified DNA sample of leaf contains 20.0 mole of guanine. Calculate the approximate percentage of purine residues?
  ক

  30%

  খ

  40%

  গ

  60%

  ঘ

  20%
• Which of these statements are INCORRECT according to chargaff’s rules?
  ক

  The molar ratio of A to T or C to G = 1

  খ

  The sum of purine = sum of pyrimidine

  গ

  The % C+G ≠ % A+T

  ঘ

  The composition of DNA remains the same in all the species
• Which bond is used to stabilize the double helix of DNA?
  ক

  Hydrophobic bond

  খ

  Hydrogen bond

  গ

  Covalent bond

  ঘ

  Ionic bond
• The primary structure of DNA and RNA proceeds in which direction?
  ক

  3’ —–> 5҆’

  খ

  5’ —–> 3’

  গ

  4’ —–> 6’

  ঘ

  3’ —–> 6’
• What is the energy currency of the living cell?
  ক

  GTP

  খ

  NADH

  গ

  FADH

  ঘ

  ATP
• Which of these statements are TRUE for a glycosidic bond?
  ক

  The bond between sugar and the nitrogenous base

  খ

  The bond between the two sugar residues

  গ

  The bond between sugar and phosphate

  ঘ

  The bond between base and phosphate
• Deoxyribose sugar is found in DNA.
  ক

  True

  খ

  False
• Name those purine bases which are commonly found in DNA and RNA?
  ক

  Adenine and guanine

  খ

  Cytosine and thymine

  গ

  Adenine and thymine

  ঘ

  Cytosine and guanine
• Name the pyrimidine base which is found in RNA but not in DNA?
  ক

  Thymine

  খ

  Uracil

  গ

  Adenine

  ঘ

  Guanine
• Who discovered nucleic acid?
  ক

  Watson and Crick

  খ

  Griffith

  গ

  Friedrich Miescher

  ঘ

  Walter Gilbert
• The monomeric unit of nucleic acid are called ___________
  ক

  Nucleotides

  খ

  Nucleosides

  গ

  Pyrimidines

  ঘ

  Purines
• ATP and GTP are __________
  ক

  cells

  খ

  receptors

  গ

  nucleotides

  ঘ

  nucleic acids
• Ribozymes are _____________
  ক

  cell organelle

  খ

  enzymes

  গ

  nucleotide

  ঘ

  nucleoside
• Purines and pyrimidines are different molecules.
  ক

  True

  খ

  False
• How many types of nucleotides are present in DNA?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• What are the types of nucleic acids are found in living organisms?
  ক

  deoxyribonucleic acid & nucleotide acid

  খ

  deoxyribonucleic acid & ribonucleic acid

  গ

  ribonucleic acid & nucleotide acid

  ঘ

  ribonucleic acid & nucleoside acid
• Which monomers compose the strands of nucleic acids?
  ক

  Amino acids

  খ

  Ribose

  গ

  Functional groups

  ঘ

  Nucleotides
• Two DNA samples A and B have melting temperatures 305K and 320K respectively. Identify the correct statement based on this information.
  ক

  A and B are complementary strands

  খ

  B has more CG pairs than A

  গ

  A has more CG pairs than B

  ঘ

  A has more hydrogen bonds than B
• Identify the complementary strand of the DNA primary structure ATGCCGATC.
  ক

  AUGCCGAUC

  খ

  TACGGCTAG

  গ

  UACGGCUAG

  ঘ

  GATCGGCAT
• Which part of the nucleotide is responsible for the formation of bonds in DNA double helix?
  ক

  Base

  খ

  Sugar

  গ

  Phosphate group

  ঘ

  Hydroxyl group of sugar
• The attachment between the base and sugar in a nucleotide is through ______ bond.
  ক

  hydrogen

  খ

  peptide

  গ

  phosphodiester

  ঘ

  glycosidic
• Which of the following best describes cytosine?
  ক

  pyrimidine, present in RNA and DNA

  খ

  pyrimidine, present only in DNA

  গ

  purine, present only in RNA

  ঘ

  purine, present in RNA and DNA
• Nucleotides are linked together by bonds between 5’ and 2’ carbons of two different pentose sugars.
  ক

  True

  খ

  False
• The structure shown is that of a _______
  ক

  DNA nucleoside

  খ

  RNA nucleoside

  গ

  DNA nucleotide

  ঘ

  RNA nucleotide
• Which sugar is present in RNA?
  ক

  β-D-ribose

  খ

  β-D-fructose

  গ

  β-D-galactose

  ঘ

  β-D-2-deoxyribose
• Which of the following bases contain two keto groups?
  ক

  Adenine

  খ

  Guanine

  গ

  Thymine

  ঘ

  Cytosine
• Which of the following bases is not present in DNA?
  ক

  Adenine

  খ

  Guanine

  গ

  Thymine

  ঘ

  Uracil
• DNA is a polynucleotide.
  ক

  True

  খ

  False
• The following compound is a component of which of the following?
  ক

  RNA

  খ

  DNA

  গ

  Adenine

  ঘ

  Guanine
• RNA on hydrolysis does not yield which of the following?
  ক

  Amino acid

  খ

  Pentose sugar

  গ

  Nitrogen base

  ঘ

  Phosphoric acid