0610/51·BiologyIGCSEEXAM MODE

Paper 5 Practical Test

0610/51 · October/November 2025

Question 30/17 answered · 40 marks total
WRITTEN ONLY

Question 3Planning: pH and amylase activity

Written only — plan an investigation into the effect of pH on amylase activity, using iodine solution.

[6]

YOUR ANSWERS

3[6]

Amylase is an enzyme that catalyses the breakdown of starch to form reducing sugars. Plan an investigation to determine the effect of pH on the activity of amylase. Use iodine solution in your method.