ExpertEasy1 markMultiple Choice
AQA GCSE · Question 02.5 · Cell Biology
What percentage of time in the cell cycle is stage A?
What percentage of time in the cell cycle is stage A?
Answer options:
A.
5%
B.
10%
C.
15%
D.
25%
How to approach this question
Visually estimate the proportion of the whole circle that segment A represents. A quarter of the circle (like a slice of pizza cut into four) is 25%. Half the circle is 50%. Compare the size of segment A to these benchmarks to choose the most reasonable percentage.
Full Answer
B.10%✓ Correct
10%
To estimate the percentage, we can compare the size of segment A to the whole circle. The whole circle represents 100%. A quarter of the circle would be 25%. Segment A is clearly smaller than a quarter. It appears to be about one-tenth of the entire circle. Therefore, 10% is the most reasonable estimate among the given options. Stage A represents mitosis, which is a relatively short part of the entire cell cycle.
Common mistakes
✗ Poor visual estimation skills.\n✗ Guessing randomly without trying to relate the segment size to a percentage.
Practice the full AQA GCSE Biology Foundation Tier Paper 1
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