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2.2 Animal tissues, organs and organ systems

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Question 91
F

A sample of amylase is heated to 80 °C and then cooled back to 37 °C. Starch solution is added, but no starch is broken down. Which statement explains this result?

[1]
A

The active site of the amylase changed shape permanently at 80 °C

B

The starch molecules changed shape and no longer fit the enzyme

C

The amylase molecules were used up by the reaction at 80 °C

D

The amylase molecules gained energy and moved away from starch

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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