A-LevelBiologyNucleic acids and protein synthesisMay/June 2020Paper 1 Q231 Mark
How many statements are true for semi-conservative replication of DNA in a eukaryotic cell? 1 The process takes place in the nucleus. 2 Adenine will line up against uracil on the complementary strand. 3 Each new molecule will contain one strand of the original molecule. 4 If the original molecule contained 40% guanine each new molecule will contain 20% guanine.
A1
B2
C3
D4
✓ Correct Answer
The correct answer is B: 2
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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