Why would you expect equal numbers of guanine and cytosine in a molecule of DNA, but not necessarily in a molecule of RNA?

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Biology

Kujo

3 August, 13:00

Why would you expect equal numbers of guanine and cytosine in a molecule of DNA, but not necessarily in a molecule of RNA?

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Novak · Answer 1

DNA is double-stranded, so there must be equal numbers of C and G because they pair to each other on the complementary strands.

RNA is only single-stranded, so there can be any number of C and G. They don't pair to each other, because there's only one strand.