MCQ
$DNA$ exists in a double-stranded form whereas $RNA $ is mainly a single stranded molecule. What is the likely reason for $DNA$ being double stranded?
  • A
    $RNA$ strands cannot form base pairs.
  • Double stranded $DNA$ is a more stable structure.
  • C
    $DNA$ cannot exist in the single stranded form.
  • D
    It is easier to replicate double stranded $DNA$ than single stranded $RNA.$

Answer

Correct option: B.
Double stranded $DNA$ is a more stable structure.
b
Double stranded $DNA$ is much more stable than single stranded $RNA$ and this helps to protect our genetic code. Having a second copy of our genetic code means that there is a reference for repair in the event of a mutation or damage.

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