Daily Practice

GCSE Science

17th May 1990

5 questions · GCSE · 584 questions in this band

1
Organisation
An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
2
The Digestive System and Enzymes
Explain what happens to an enzyme above its optimum temperature.
3
The Circulatory System and Heart
Name the substance in red blood cells that binds oxygen.
4
Plant Tissues, Transport and Transpiration
Why does a potometer measure water uptake rather than transpiration directly?
5
Infection and Response
Explain why a small number of healthy volunteers are given a very low dose of a new drug in the first stage of a clinical trial.

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