Why would you expect equal numbers of guanine and cytosine in a molecule of DNA, but not necessarily in a molecule of RNA? a Because in RNA guanine pairs with uracil b RNA does not have cytosine - Because in DNA all nucleotides are expected to be paired d Because DNA is a helical molecule

Question

Why would you expect equal numbers of guanine and cytosine in a molecule of DNA, but not necessarily in a molecule of RNA? a Because in RNA guanine pairs with uracil b RNA does not have cytosine - Because in DNA all nucleotides are expected to be paired d Because DNA is a helical molecule

Answer 1

c. Because in DNA all nucleotides are expected to be paired

Answer 2

In a DNA molecule, guanine (G) always pairs with cytosine (C) following Chargaff's rules, leading to equal numbers of these nucleotides. DNA's double-helix structure ensures this complementary base pairing, where G pairs with C and adenine (A) pairs with thymine (T). However, RNA is usually single-stranded and does not follow the same pairing rules as DNA. Guanine in RNA pairs with cytosine, but there is no established mechanism that requires equal numbers of guanine and cytosine nucleotides in RNA. Additionally, RNA contains uracil (U) instead of thymine.

Question

Why would you expect equal numbers of guanine and cytosine in a molecule of DNA, but not necessarily in a molecule of RNA? a Because in RNA guanine pairs with uracil b RNA does not have cytosine - Because in DNA all nucleotides are expected to be paired d Because DNA is a helical molecule

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