Daily Practice

GCSE Science

15th September 1992

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
Name two structures found in a plant cell but not in an animal cell.
3
Cell Division and Stem Cells
Give one advantage of therapeutic cloning over using unrelated embryonic stem cells.
4
Transport in and out of Cells
Name the process that moves substances against a concentration gradient.
5
Organisation
Explain why the rate of an enzyme-controlled reaction decreases sharply above the enzyme's optimum temperature.

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