A-LevelBiologyEnzymesOct/Nov 2020Paper 1 Q141 Mark
The painkiller ibuprofen reduces the activity of an enzyme involved in the production of prostaglandin. Ibuprofen binds reversibly to the active site of the enzyme. Which type of enzyme inhibition describes this example and why?
Acompetitive inhibition because ibuprofen alters the shape of the enzyme
Bcompetitive inhibition because ibuprofen and the substrate cannot bind at the same time
Cnon-competitive inhibition because ibuprofen blocks the active site
Dnon-competitive inhibition because ibuprofen has the same shape as the substrate
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of enzymes 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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