Two similar-sized animal cells are placed in a 0.5% sucrose solution. Cell A enlarges for a while and then stops; cell B continues to enlarge and finally ruptures. Which of the following must have been TRUE at the beginning of the experiment?
A) Cell A has a higher concentration of sucrose than cell B.
B) Cell A was hypotonic to the solution, and cell B was hypertonic.
C) Cell B has a higher concentration of sucrose than cell A.
D) Cell A was hypertonic to the solution, and cell B was hypotonic.
E) Cells A and B were isotonic to each other.
C
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