DNA MCQs with answers Page - 9

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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A

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Q. Assertion (A): DNA replication is bidirectional.
Reason (R): Replication proceeds from origin in both directions.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Assertion (A): Primase synthesizes RNA primers.
Reason (R): DNA polymerase cannot initiate synthesis.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Assertion (A): Topoisomerase prevents DNA tangling.
Reason (R): It cuts and rejoins DNA strands.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Assertion (A): Telomeres shorten after each cell division.
Reason (R): DNA polymerase cannot fully replicate chromosome ends.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Assertion (A): DNA is negatively charged.
Reason (R): It contains phosphate groups.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Assertion (A): Replication fork is Y-shaped.
Reason (R): DNA unwinds during replication.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Assertion (A): mRNA carries genetic code.
Reason (R): It is synthesized during translation.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are false
  • (C) A is true but R is false
  • (D) A is false but R is true

A

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Q. Assertion (A): DNA replication requires energy.
Reason (R): Nucleotide addition releases pyrophosphate.

  • (A) Both A and R are true and R is correct
  • (B) Both A and R are true but R is not correct
  • (C) A is true but R is false
  • (D) A is false but R is true

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