A) Active transport of substances across the plasma membrane
B) Passive transport of substances across the plasma membrane
C) Diffusion of substances across the plasma membrane
D) The thickness of the plasma membrane
Correct Answer: A
Solution :
Cyanide reacts with one of the proteins (cytochrome-a3) in the electron transport system and prevents transfer of electron tooxygen. It leads to checking the ATP formation through oxidative phosphorylation. ATP is required for active transport of substances across the plasma membrane, besides some other metabolic reactions.
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