O-LevelBiologyCoordination & Response5090/12 · Oct/Nov 2022 · Q261 Mark

Which graph shows the lengths of the biceps and triceps muscles in the upper arm when the elbow joint is fully extended and the arm is straight?

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ABiceps and triceps bars are of similar length.

BBiceps bar is shorter than triceps bar.

CBiceps bar is longer than triceps bar.

DBiceps bar is shorter than triceps bar with both relatively long.

✓ Correct answer

C: Biceps bar is longer than triceps bar.

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2022 Paper 1 Variant 2, question 26.

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