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Question

Which of the following processes utilizes a proton pump?

A
Glycolysis
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B
Fermentation
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C
Krebs cycle
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D
Electron transport chain
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E
Photosynthesis
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Solution

The correct option is D Electron transport chain
The proton pump is the process of creating a proton gradient across the membrane. During the process of Electron transport chain, protons physically move across the membrane to create an electrochemical gradient that helps in the synthesis of ATP form ATP synthetase. This proton pump is not created in the other four processes.
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