Chemiosmosis and ATP synthase
CHEMIOSMOSIS AND ATP SYNTHASE · IMAT Doutor1 / 1
An uncoupler such as 2,4-dinitrophenol carries protons across the membrane outside ATP synthase. The result is:
A
Oxygen consumption falls to zero, because the proton gradient is no longer being maintained
B
Electron transport accelerates, oxygen consumption rises, and the energy is released as heat instead of ATP
C
Electron transport stops and the cell cools down, because no energy is extracted from NADH
D
ATP synthesis rises sharply, because protons now cross the membrane at many more sites than before and each one drives the synthase
E
The chain begins to work in reverse, reducing NAD+ with electrons taken from water
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