DNA MCQs with answers Page - 4

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. Who discovered the structure of DNA?

  • (A) Gregor Mendel
  • (B) James Watson and Francis Crick
  • (C) Charles Darwin
  • (D) Louis Pasteur

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Q. What is the shape of DNA?

  • (A) Single Helix
  • (B) Double Helix
  • (C) Circular
  • (D) Linear

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Q. Which nitrogen base pairs with Adenine in DNA?

  • (A) Cytosine
  • (B) Guanine
  • (C) Thymine
  • (D) Uracil

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Q. Which nitrogen base pairs with Cytosine?

  • (A) Adenine
  • (B) Thymine
  • (C) Guanine
  • (D) Uracil

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Q. Which base is NOT found in DNA?

  • (A) Adenine
  • (B) Uracil
  • (C) Thymine
  • (D) Cytosine

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Q. DNA replication occurs in which phase of the cell cycle?

  • (A) G1 phase
  • (B) S phase
  • (C) G2 phase
  • (D) M phase

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Q. What enzyme is responsible for DNA replication?

  • (A) RNA polymerase
  • (B) DNA polymerase
  • (C) Helicase
  • (D) Ligase

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Q. Which enzyme unwinds the DNA double helix?

  • (A) Ligase
  • (B) Helicase
  • (C) Polymerase
  • (D) Topoisomerase

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Q. What are the building blocks of DNA?

  • (A) Amino acids
  • (B) Nucleotides
  • (C) Fatty acids
  • (D) Sugars

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Q. Each nucleotide consists of:

  • (A) Sugar, phosphate, base
  • (B) Sugar, protein, base
  • (C) Fat, sugar, base
  • (D) Protein, lipid, base
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