SAT Subject Biology Practice Question 451: Answer and Explanation
1. An animal cell placed into a 0.9% solute solution would do which of the following?
A. Remain unchanged
B. Swell and burst
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.