DNA MCQs with answers Page - 6

You will find multiple-choice questions (MCQs) related to #DNA here. Go through these questions to prepare effectively for your upcoming exams and interviews.

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Q. Which enzyme joins Okazaki fragments?

  • (A) DNA polymerase I
  • (B) DNA ligase
  • (C) Helicase
  • (D) Primase

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Q. Which DNA polymerase in prokaryotes has proofreading activity?

  • (A) DNA polymerase I
  • (B) DNA polymerase II
  • (C) DNA polymerase III
  • (D) All of the above

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Q. The direction of DNA synthesis is:

  • (A) 3' to 5'
  • (B) 5' to 3'
  • (C) Both directions
  • (D) Random

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Q. Which statement about semiconservative replication is correct?

  • (A) Both strands are newly synthesized
  • (B) One strand is parental, one is new
  • (C) DNA is copied randomly
  • (D) Replication occurs without enzymes

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Q. Which experiment proved semiconservative replication?

  • (A) Hershey-Chase experiment
  • (B) Meselson-Stahl experiment
  • (C) Griffith experiment
  • (D) Avery-MacLeod experiment

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Q. What is the role of primase in DNA replication?

  • (A) Synthesizes DNA
  • (B) Removes primers
  • (C) Synthesizes RNA primer
  • (D) Joins fragments

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Q. Telomerase is active in:

  • (A) Somatic cells
  • (B) Germ cells
  • (C) Muscle cells
  • (D) Nerve cells

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Q. Which base pairing rule is correct?

  • (A) A-G, C-T
  • (B) A-T, C-G
  • (C) A-C, G-T
  • (D) A-U, C-G

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Q. Which histone protein is NOT part of nucleosome core?

  • (A) H2A
  • (B) H2B
  • (C) H3
  • (D) H1

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Q. DNA replication in eukaryotes occurs in:

  • (A) Cytoplasm
  • (B) Nucleus
  • (C) Ribosomes
  • (D) Golgi apparatus
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