A-LevelBiologyEnzymesOct/Nov 2014Paper 1 Q151 Mark
The AIDS virus produces a long polypeptide that is hydrolysed by a protease enzyme to several smaller peptides. This viral protease is the target of anti-AIDS drugs. Which feature is essential for the success of these drugs?
Acomplex structure that inhibits many types of viral enzyme
Bmolecule containing a heavy metal atom that is a non-competitive inhibitor of enzymes
Cprotein that can act as a competitive inhibitor of protease enzymes
Dspecific structure that inhibits only viral protease
✓ Correct Answer
The correct answer is D: specific structure that inhibits only viral protease
📋 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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