GCSE Biology – Cells and Control – 2 – Exam Style Questions with Answers

The tips of plant roots are where many cells are dividing by mitosis.
Which term describes the area of a root where many cells are dividing by mitosis?

Figure 7 shows mitosis occurring in some plant cells.
Which stage of mitosis is shown in cell R?

The diameter of one cell in Figure 4 is 0.075 mm.
Which is this diameter in μm?

Figure 7 shows a height percentile chart for boys.
The numbers on the right-hand side of the graph show the percentiles of the population for each growth curve.
A 10-year-old boy has a height of 140 cm.
Which is the percentile range for height for this boy?

Cell division processes are used to produce body cells and gametes.
Figure 9 shows the development of a human embryo from a fertilised egg
Which process occurs causing the divided cells to become specialised?

Figure 3 shows a cell from an onion root tip. This cell is dividing by mitosis.
Which structure is labelled Z?

Figure 4 shows a percentile growth chart for the height of girls aged 2 – 20.
Which girl is most likely to need to be treated with human growth hormone?

The mitotic index is often used in the diagnosis of cancer.
State the effect of cancer on cell division.