1.2 Cell division

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Question 10
Medium

A scientist is studying the cell cycle of human skin cells, where one complete cycle takes 12 hours.

Figure 1 shows the relative proportion of time spent in each of the three stages of this cell cycle (Stage A, Stage B, and Stage C).

A circular pie chart representing a cell cycle, starting at the 12 o'clock position with an arrow pointing clockwise. The circle is divided into 12 equal sectors by dashed radial lines. Stage A is a light-coloured region that spans clockwise from 12 o'clock to 9 o'clock (covering 9 sectors). Stage B is a medium-shaded region that spans clockwise from 9 o'clock to 11 o'clock (covering 2 sectors). Stage C is a dark-shaded region that spans from 11 o'clock back to 12 o'clock (covering 1 sector).

a.

What percentage of the total time of the cell cycle is spent in Stage A?

[2]
b.

If a single skin cell divides to form two new cells every 12 hours, how many hours will it take for one original cell to divide and form a group of 16 cells?

[2]

1.2 Cell division Questions

  1. GCSE
  2. /Biology
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