A-LevelBiologyNucleic acids and protein synthesisFeb/Mar 2019Paper 1 Q211 Mark
A length of DNA was analysed and sequenced. 24% of its nitrogenous bases were adenine. Which percentage of the bases will be cytosine?
A24
B26
C48
D76
✓ Correct Answer
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...
📋 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...
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