Scientists investigated the link between the number of mitochondria in sperm cells and the swimming speed of the sperm cells.
The Table shows their results.
Table
| Mean number of mitochondria per sperm cell | Mean swimming speed in μm/s\mu\text{m/s}μm/s |
|---|---|
| 50 | 20 |
| 60 | 28 |
| 70 | 35 |
| 80 | 41 |
Calculate the percentage increase in mean swimming speed when the mean number of mitochondria increases from 50 to 80.
Explain the relationship shown in the Table.
A sperm cell swims quickly but has a damaged acrosome.
Explain why this sperm cell is unlikely to fertilise an egg cell.
41 exam-style questions on Edexcel GCSE Biology 1.1 Cells and cell structure, covering 1.1.1 Sub-cellular structures and functions, 1.1.2 Specialised cells and their adaptations, and 1.1.3 Microscope technology and cell structures. Each one has a worked solution and a mark scheme showing where the marks go.