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Edexcel International GCSE (9–1) Biology Student Book · Chapter 1: Life Processes

Enzymes past paper questions

37 questions from 19 past papers. Try the first one now 👇

Question 1 · Paper 2B, November 2023 · Q2(a), (d)(i), (d)(iii)6 marks
Question 2: catalase breaks down hydrogen peroxide into water and oxygen; (a) state what is meant by the term enzyme; (d) a table of the mean rate of reaction at pH 4 to 8 (0.8, 1.2, 1.4, 2.4, 0.6 cm³ per minute); (i) calculate the percentage change in the rate from pH 4 to pH 7; (iii) explain the effect of changing pH on an enzyme-controlled reaction.

© Pearson Education Ltd. Paper 2B November 2023, question 2. The full paper on Pearson's website

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