Daily Practice · GCSE Science

Daily Practice - GCSE Science

20th January 1994

5 questions · GCSE · 584 questions in this band

1
Cell Biology
A student views a red blood cell at a magnification of x2000. The image of the cell measures 20 mm across. Calculate the real width of the cell, giving your answer in micrometres (um).
2
Cell Structure and Microscopy
Give one advantage of a light microscope over an electron microscope.
3
Cell Division and Stem Cells
State three functions of mitosis.
4
Transport in and out of Cells
Calculate the surface area to volume ratio of a cube of side 2 cm.
5
Organisation
Explain why the rate of an enzyme-controlled reaction decreases sharply above the enzyme's optimum temperature.

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