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1.3 Enzymes

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Question 2
F

Lactase breaks down lactose but does not break down sucrose.

Which statement explains this difference?

[1]
A

Only sucrose has a shape complementary to the active site.

B

Only lactose changes the active site into a different enzyme.

C

Only sucrose changes the active site into a different enzyme.

D

Only lactose has a shape complementary to the active site.

Markscheme

1.3 Enzymes Questions

  1. GCSE
  2. /Biology
  3. /1.3 Enzymes

44 exam-style questions on Edexcel GCSE Biology 1.3 Enzymes, covering 1.3.1 Mechanism of enzyme action, 1.3.2 Denaturation of enzymes, 1.3.3 Factors affecting enzyme activity, and 1.3.4 Measuring energy in food by calorimetry. Each one has a worked solution and a mark scheme showing where the marks go.

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