Skip to main content
A-LevelBiologyEnzymesMay/June 2025Paper 1 Q121 Mark

Prokaryotes and eukaryotes use extracellular enzymes. Extracellular digestive enzymes are found in the external environments of some prokaryotes. Some prokaryotes are digested by hydrolytic enzymes during phagocytosis by eukaryotic cells. Which row shows the locations where extracellular enzymes are produced?

Asite of production of digestive enzymes used by prokaryotes: inside cells, site of production of hydrolytic enzymes used by eukaryotic phagocytes: inside cells
Bsite of production of digestive enzymes used by prokaryotes: inside cells, site of production of hydrolytic enzymes used by eukaryotic phagocytes: outside cells
Csite of production of digestive enzymes used by prokaryotes: outside cells, site of production of hydrolytic enzymes used by eukaryotic phagocytes: inside cells
Dsite of production of digestive enzymes used by prokaryotes: outside cells, site of production of hydrolytic enzymes used by eukaryotic phagocytes: outside cells

✓ Correct Answer

The correct answer is A: site of production of digestive enzymes used by prokaryotes: inside cells, site of production of hydrolytic enzymes used by eukaryotic phagocytes: inside cells

📋 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

Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.

Sign Up Free to Unlock →

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 May/June 2025 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.

Related Biology Questions

© 2026 Oracle Prep — The AI-Powered Cambridge Exam Engine