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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?

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RNA strands cannot form base pairs.

Double stranded DNA is a more stable structure.

DNA cannot exist in the single stranded form.

It is easier to replicate double stranded DNA than single stranded RNA.

answer is B.

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Detailed Solution

Double stranded DNA is much more stable and less reactive 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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