Question

Which nitrogenous base in RNA pairs with adenine during bacterial transcription?

Options

• Thymine (T)

• Cytosine (C)

• Uracil (U)

• Guanine (G)

Answer 1

Uracil (U) pairs with adenine (A) in RNA, unlike DNA where thymine pairs with adenine. This is a key difference between RNA and DNA. Uracil is found exclusively in RNA, while thymine is found exclusively in DNA. Both have similar structures and can form two hydrogen bonds with adenine.