A-LevelBiologyEnzymesMay/June 2025Paper 5 Q117 Marks
Pepsin is an enzyme that is present in gastric juice. Gastric juice is secreted into the stomach of humans and many other animals. Pepsin catalyses the hydrolysis of proteins into peptides, as shown in Fig. 1.1. [Figure 1.1] Egg albumen (egg white) contains a high proportion of protein. 10% albumen solution is a cloudy-white colour. This becomes colourless when pepsin is added to the 10% albumen solution. A student used a colorimeter to follow the progress of the hydrolysis of protein by pepsin.
✓ Correct Answer
The correct answer is —. 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep