Question

1. how are the base - pairing rules different for rna than dna?

in rna, guanine is replaced with uracil.
in rna, cytosine is replaced with uracil.
in rna, adenine is replaced with uracil.
in rna, thymine is replaced with uracil.
clear all

Explanation:

DNA base-pairing uses A-T and G-C. RNA uses uracil (U) instead of thymine (T), so its base pairs are A-U and G-C. This is the key difference in base-pairing rules between RNA and DNA.

Answer:

In RNA, Thymine is replaced with Uracil.