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1.3 Enzymes

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Question 3
F

The Figure shows the effect of substrate concentration on the rate of an enzyme-controlled reaction. The concentration of the enzyme was kept the same.

Figure

image

a.

Describe the effect of substrate concentration on the rate of reaction.

[2]
b.

Explain why the rate of reaction increases between 0% and 2% substrate concentration.

[2]
c.

Explain why the rate of reaction does not increase above 3% substrate concentration.

[2]
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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