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Unit 3 · Movement into and out of Cells

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Cambridge IGCSE Biology 0610 · 61 questions

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Q58Movement into and out of Cells

Which statement best describes Concentration gradient?

(a)The movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration, against a concentration gradient, using energy from respiration.
(b)The difference in concentration of a substance between two regions.
(c)The pulling away of the cytoplasm and cell membrane from the cell wall when a plant cell loses water by osmosis.
(d)The net movement of particles from a region of their higher concentration to a region of their lower concentration, down a concentration gradient, as a result of their random movement.

Correct answer: (b) The difference in concentration of a substance between two regions.

Explanation: Concentration gradient: The difference in concentration of a substance between two regions.

Related lesson

3.3 Active transportMovement into and out of Cells

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BiologyMovement into and out of CellsCambridge IGCSE Biology 0610