O-LevelBiologyCell Biology5090/12 · May/June 2017 · Q31 Mark

Which row defines active transport?

Ano, down a concentration gradient, yes

Bno, up a concentration gradient, no

Cyes, down a concentration gradient, no

Dyes, up a concentration gradient, yes

✓ Correct answer

D: yes, up a concentration gradient, yes

Oracle Prep sorts past-paper questions by topic, so you can drill Cell Biology and see which topics are most likely to come up next.

Topic: Cell Biology, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2017 Paper 1 Variant 2, question 3.

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