A-LevelBiologyEnzymesFeb/Mar 2016Paper 1 Q121 Mark

The graphs show the effects of temperature and pH on enzyme activity. Which statement is a correct explanation of the enzyme activity? [Figure 12.1]

Q: What topic does this question test?

This question tests Enzymes in A-Level Biology (syllabus code 9700). It is worth 1 mark.

AAt P, hydrogen bonds are formed between enzyme and substrate.

BAt Q, the kinetic energy of enzyme and substrate is highest.

CAt R, disulfide bonds in the enzyme begin to break.

DAt S, the enzyme is completely denatured.

✓ Correct Answer

The correct answer is A: At P, hydrogen bonds are formed between enzyme and substrate.

📋 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.

🔒

Unlock the Examiner's Analysis

Join thousands of Cambridge students already using Oracle Prep

About This A-Level Biology Question

Topic

This multiple-choice question tests Enzymes in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology Feb/Mar 2016 examination, Paper 1 Variant 2.

Practice on Oracle Prep

Oracle Prep provides AI-powered practice for all Cambridge O-Level and A-Level subjects. Our platform includes topic predictions with 87.7% accuracy, AI essay grading, and a comprehensive question bank spanning 25 years of past papers across 29 subjects.