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2.2 Animal tissues, organs and organ systems

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Question 21
F

A student measured the mass of starch broken down by amylase in 5 minutes at three temperatures. The masses were 0.20 g at 20 °C, 0.45 g at 40 °C and 0.05 g at 60 °C. Which conclusion is supported by these results?

[1]
A

The optimum temperature of this amylase is closest to 40 °C

B

The optimum temperature of this amylase is closest to 60 °C

C

This amylase was denatured at 20 °C and also denatured at 60 °C

D

This amylase worked exactly twice as fast at 40 °C as at 20 °C

Markscheme

2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems

179 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.

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