Single answerDifficulty 3/5 · ChallengingOlympiadRepresenting dataArgumentation
Cyclin comes and goes
Fertilised sea urchin eggs divide rapidly and in step, so a sample of many embryos behaves like one cell. Researchers took samples every 10 minutes through two division cycles and measured the amount of cyclin B, the amount of CDK1 protein, and MPF (cyclin B–CDK1) kinase activity, noting the stage seen under the microscope. Values are relative to each measure's maximum.
Data
| Time (min) | Stage | Cyclin B | CDK1 protein | MPF activity |
|---|---|---|---|---|
| 0 | Interphase | 5 | 100 | 2 |
| 10 | Interphase | 25 | 100 | 3 |
| 20 | Interphase | 55 | 98 | 8 |
| 30 | Interphase | 85 | 100 | 15 |
| 40 | Metaphase | 100 | 100 | 100 |
| 50 | Telophase | 20 | 99 | 10 |
| 60 | Interphase | 8 | 100 | 3 |
| 70 | Interphase | 40 | 100 | 5 |
| 80 | Interphase | 80 | 99 | 12 |
| 90 | Metaphase | 100 | 100 | 95 |
| 100 | Telophase | 10 | 100 | 4 |
Which conclusion is best supported by the data?
Answer every part to submit.