A-LevelBiologyNucleic acids and protein synthesis9700/12 · Oct/Nov 2024 · Q241 Mark
Which row correctly describes cytosine?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Aring structure: double, number of hydrogen bonds it forms with its complementary base: three, type of base: purine
Bring structure: double, number of hydrogen bonds it forms with its complementary base: two, type of base: pyrimidine
Cring structure: single, number of hydrogen bonds it forms with its complementary base: three, type of base: pyrimidine
Dring structure: single, number of hydrogen bonds it forms with its complementary base: two, type of base: purine
✓ Correct answer
C: ring structure: single, number of hydrogen bonds it forms with its complementary base: three, type of base: pyrimidine
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Nucleic acids and protein synthesis and see which topics are most likely to come up next.
Sign up free →