A scientist takes measurements from a skin cell immediately after each of the four stages of one cell cycle. The measurements after the final stage are from one of the two new cells produced. The records are not shown in time order.
| Record | Cell mass in ng | Amount of DNA in the nucleus in pg |
|---|---|---|
| W | 3.2 | 12.8 |
| X | 1.6 | 6.4 |
| Y | 2.4 | 6.4 |
| Z | 2.4 | 12.8 |
Which sequence places the records in the order in which they were made?
X, Y, Z, W
Z, Y, W, X
Y, Z, W, X
Y, W, Z, X
194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.