Scientists counted the mitochondria in cells from four tissue samples taken from a sheep. The table shows the results.
| Tissue sample | Mean number of mitochondria per cell |
|---|---|
| A | 1800 |
| B | 650 |
| C | 1250 |
| D | 400 |
Which statement about these cells is supported by the results?
Cells in sample D are likely to need the most energy of the four samples.
Cells in sample B are likely to carry out photosynthesis as well as respiration.
Cells in sample C are likely to need more energy than cells in sample B.
Cells in sample A are likely to store the most energy for later use.
130 exam-style questions on OCR GCSE Biology 1.1 Cell structures, covering 1.1.1 Viewing cells with light microscopes, 1.1.2 Sub-cellular structures and functions, and 1.1.3 Electron microscopy and resolution. Each one has a worked solution and a mark scheme showing where the marks go.