If the ATP-generating mechanisms in a cell are poisoned and the cell depletes its ATP reserves, which would occur first?
A. Facilitated diffusion of molecules would cease.
B. Ion concentration gradients would reach equilibrium across the cell membrane.
C. All transport processes would cease immediately when the ATP was depleted.
D. Primary active transport of molecules would cease.
E. Secondary active transport of molecules would cease.
Answer: D
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