A-LevelBiologyNucleic acids and protein synthesis9700/12 · May/June 2025 · Q241 Mark
Sometimes hydrogen bonds form temporarily between the bases of two strands of RNA. How many hydrogen bonds form when guanine and uracil each bind to their complementary base?
Aguanine: 3, uracil: 3
Bguanine: 3, uracil: 2
Cguanine: 2, uracil: 3
Dguanine: 2, uracil: 2
✓ Correct answer
B: guanine: 3, uracil: 2
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