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BIO NMDCAT Structure of DNA
nmdcat.online July 3, 2026

2. The nitrogenous base that forms three specific hydrogen bonds with cytosine inside the DNA molecule is

A. Adenine
B. Thymine
C. Guanine
✓
D. Uracil

📝 Explanation

Guanine pairs with cytosine via three hydrogen bonds, creating a more thermally stable bond than the adenine-thymine pair.

📖 Additional Information

  • Adenine
  • Thymine
  • Guanine
  • Uracil

Guanine pairs with cytosine via three hydrogen bonds, creating a more thermally stable bond than the adenine-thymine pair.

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