BIO NMDCAT BIOLOGICAL MOLECULES

nmdcat.online June 27, 2026

Regarding the structure of RNA, the nitrogenous base uracil replaces thymine and, like thymine, forms hydrogen bonds with

A. Adenine

✓

B. Guanine

C. Cytosine

D. Xanthine

📝 Explanation

Uracil is a pyrimidine base found in RNA. Like thymine (its counterpart in DNA), its structure is complementary to adenine, and it forms two hydrogen bonds with adenine during base pairing. Guanine pairs with cytosine.

📖 Additional Information

Adenine
Guanine
Cytosine
Xanthine

Uracil is a pyrimidine base found in RNA. Like thymine (its counterpart in DNA), its structure is complementary to adenine, and it forms two hydrogen bonds with adenine during base pairing. Guanine pairs with cytosine.

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