A-LevelBiologyNucleic acids and protein synthesisFeb/Mar 2017Paper 1 Q241 Mark
Which statement about nitrogenous bases is correct?
AAdenine is a pyrimidine with a double ring structure.
BCytosine is a purine with a double ring structure.
CGuanine is a purine with a single ring structure.
DUracil is a pyrimidine with a single ring structure.
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of nucleic acids and protein synthesis within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep