A scientist used a microscope to examine cells from the tip of a growing sunflower shoot. The table shows the number of cells observed in each stage of the cell cycle.
| Stage of the cell cycle | Number of cells |
|---|---|
| 1 | 90 |
| 2 | 30 |
| 3 | 30 |
Stage 2 takes 4.0 hours.
How long does one complete cell cycle take in these cells?
16 hours
20 hours
12 hours
0.8 hours
104 exam-style questions on AQA GCSE Biology 1.2 Cell division, covering 1.2.1 Chromosomes, 1.2.2 Mitosis and the cell cycle, and 1.2.3 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.