O-LevelBiologyCoordination & Response5090/11 · May/June 2020 · Q251 Mark

What are the effects of heroin? key ✓ = yes x = no

Acan cause addiction ✓, delays sleep and increases alertness ✓, withdrawal symptoms are severe ✓

Bcan cause addiction ✓, delays sleep and increases alertness ✓, withdrawal symptoms are severe x

Ccan cause addiction ✓, delays sleep and increases alertness x, withdrawal symptoms are severe ✓

Dcan cause addiction x, delays sleep and increases alertness x, withdrawal symptoms are severe ✓

✓ Correct answer

C: can cause addiction ✓, delays sleep and increases alertness x, withdrawal symptoms are severe ✓

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2020 Paper 1 Variant 1, question 25.

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