A-LevelBiologyNucleic acids and protein synthesis9700/12 · Oct/Nov 2019 · Q231 Mark
What is correct for uracil?
AIt has a single ring structure: ✓, It is a purine: ✓, It joins its complementary base with 2 hydrogen bonds: ✓
BIt has a single ring structure: ✓, It is a purine: x, It joins its complementary base with 2 hydrogen bonds: ✓
CIt has a single ring structure: x, It is a purine: ✓, It joins its complementary base with 2 hydrogen bonds: x
DIt has a single ring structure: x, It is a purine: x, It joins its complementary base with 2 hydrogen bonds: ✓
✓ Correct answer
B: It has a single ring structure: ✓, It is a purine: x, It joins its complementary base with 2 hydrogen bonds: ✓
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