Multiple Choice
Where is a bacterial cell's DNA found?
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5. Cell Components
Prokaryotic & Eukaryotic Cells
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Which of the following is the most important factor that limits the size of cells?
A
Number of mitochondria
B
Amount of DNA
C
Presence of a cell wall
D
Surface area-to-volume ratio
Verified step by step guidance1
Understand that cells need to efficiently exchange materials with their environment, which is largely dependent on their surface area relative to their volume.
Recognize that as a cell grows, its volume increases faster than its surface area, leading to a decreased surface area-to-volume ratio.
Consider that a lower surface area-to-volume ratio means less surface area available for the exchange of materials per unit of volume, which can limit the cell's ability to obtain nutrients and expel waste.
Acknowledge that this limitation is a key reason why cells remain small or adopt shapes that increase surface area, such as the folding of membranes.
Conclude that the surface area-to-volume ratio is the most important factor limiting cell size, as it directly impacts the cell's ability to maintain homeostasis and perform necessary functions.
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