NCEA Level 2 Biology Practice Questions - New Zealand Certificate Of Educational Achievement Level 2 Biology Exam

What happens to a plant cell's volume and structure when it is placed in a hypertonic solution?

Water enters the cell by osmosis, causing it to swell and burst (lyse). Water leaves the cell by active transport, causing the cell wall to collapse. Water leaves the cell by osmosis, causing the cytoplasm to shrink away from the cell wall (plasmolysis). There is no net movement of water, and the cell remains turgid.

Correct Answer:

Water leaves the cell by osmosis, causing the cytoplasm to shrink away from the cell wall (plasmolysis).

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