A-LevelBiologyNucleic acids and protein synthesisMay/June 2019Paper 1 Q181 Mark
Which statement correctly describes the base pairing in a molecule of DNA?
AThe purine adenine forms bonds with the pyrimidine thymine.
BThe purine adenine forms bonds with the pyrimidine uracil.
CThe purine cytosine forms bonds with the pyrimidine guanine.
DThe purine guanine forms bonds with the pyrimidine thymine.
✓ Correct Answer
The correct answer is A. 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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