DNA MCQs with answers Page - 2

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 of the following is a nitrogenous base found in DNA?

  • (A) Cytosine
  • (B) Uracil
  • (C) Ribose
  • (D) Glucose

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Q. DNA replication is described as which type of process?

  • (A) Conservative
  • (B) Semi-conservative
  • (C) Dispersive
  • (D) Lytic

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Q. The enzyme responsible for unzipping DNA strands during replication is called?

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

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Q. Which enzyme adds nucleotides during DNA replication?

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

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Q. Which type of bond joins nucleotides in a single strand of DNA?

  • (A) Hydrogen bond
  • (B) Phosphodiester bond
  • (C) Ionic bond
  • (D) Peptide bond

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Q. In DNA, guanine always pairs with which base?

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

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Q. The process of making RNA from DNA is known as?

  • (A) Translation
  • (B) Transcription
  • (C) Replication
  • (D) Transformation

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Q. The shape of DNA was first described as a 'double helix' in which year?

  • (A) 1945
  • (B) 1953
  • (C) 1962
  • (D) 1970

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Q. Which scientist’s X-ray diffraction images helped discover DNA’s structure?

  • (A) Rosalind Franklin
  • (B) Gregor Mendel
  • (C) Charles Darwin
  • (D) Alfred Hershey

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Q. DNA is composed of how many strands?

  • (A) One
  • (B) Two
  • (C) Three
  • (D) Four
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