SAT Subject Biology Practice Question 451: Answer and Explanation

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Question: 451

1. An animal cell placed into a 0.9% solute solution would do which of the following?

A. Remain unchanged
B. Swell and burst
C. Shrivel
D. Swell and divide
E. Release solute by exocytosis

Correct Answer: A


A You should know that animal cells are approximately as concentrated as (isotonic to) a 0.9% solute solution. If the cells are placed in such a solution, there will be no osmosis, so the cell will neither swell nor shrink.

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