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Cell Size and Exchange Efficiency
Grade Level
AP Biology
APB.123 Cell Size and Exchange Efficiency
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A cell cycle checkpoint is activated when exchange capacity per unit volume drops below metabolic demand. Which prediction follows from surface area-to-volume ratio?
A
Cells are likely to grow indefinitely because larger cells always exchange more efficiently.
B
Cells are likely to divide before becoming so large that surface area-to-volume ratio is too low to meet demand.
C
Cells should divide only after membrane area becomes irrelevant to exchange.
D
Cells should become spherical only after volume decreases to zero.
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