A-LevelBiologyNucleic acids and protein synthesisMay/June 2025Paper 1 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
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The correct answer is B. This question tests the candidate's understanding of nucleic acids and protein synthesis within the Biologysyllabus. The examiner's mark scheme requires...
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