Daily Practice · GCSE Science

Daily Practice - GCSE Science

14th October 1993

5 questions · GCSE · 584 questions in this band

1
Cell Division and Stem Cells
How many pairs of chromosomes are there in a human body cell?
2
Transport in and out of Cells
State three factors that increase the rate of diffusion.
3
Organisation
Explain why the rate of an enzyme-controlled reaction decreases sharply above the enzyme's optimum temperature.
4
The Digestive System and Enzymes
What is an enzyme?
5
The Circulatory System and Heart
State the function of the valves in the heart and in veins.

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