9
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Components of Cells

Question 9 • AP Biology - SC5182 A

What characteristics would improve a cell’s surface to volume ratio? Choose three options.

Answer
A
Increase the surface area but keep the volume relatively the same.
B
Increase the length of the cell in order to increase both surface area and volume.
C
Divide a cell into many, increasing the surface area.
D
Increase the volume of a cell.
E
Change the shape to one that has a better surface to volume ratio.

Explanation

A cell’s surface-to-volume ratio improves when it has more surface area relative to its volume. Increasing surface area while keeping volume about the same improves the ratio, and dividing a cell into many smaller cells increases their combined surface area relative to their total volume. Changing to a shape with a better surface-to-volume ratio can also help. Simply increasing the cell’s volume, or increasing its length along with both surface area and volume, does not necessarily improve the ratio.

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