Mitochondria are found in the cells of animals and plants.
A scientist counts the number of mitochondria in four types of cell from a mouse.
The Table shows the results.
Table
| Type of cell | Mean number of mitochondria per cell |
|---|---|
| heart muscle cell | 5000 |
| liver cell | 1700 |
| skin cell | 600 |
| fat storage cell | 250 |
Name the process that takes place in mitochondria.
Mitochondria contain enzymes.
State why.
Use the Table to calculate how many times more mitochondria a heart muscle cell has than a fat storage cell.
Explain why heart muscle cells have more mitochondria than fat storage cells.
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.