Uracil Forms a Complementary Pair with ____ in RNA and ____

Question

Uracil forms a complementary pair with ____ in RNA and ____ in DNA.
A) adenine; adenine
B) adenine; thymine
C) thymine; thymine
D) thymine; adenine
E) uracil; uracil

Accepted Answer

Uracil pairs with adenine in RNA, and in DNA, where uracil is replaced by thymine, adenine pairs with thymine. However, since uracil does not normally pair with a base in DNA, the correct answer reflects uracil's pairing in RNA.