NEET 2008 Biology question

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because

(1)There is a change in the permeability of the inner mitochondrial membrane toward adenosine diphosphate (ADP)
(2)High energy bonds are formed in mitochondrial proteins
(3)ADP is pumped out of the matrix into the intermembrane space
(4)A proton gradient forms across the inner membraneCorrect

Answer: (4)

Solution

According to Mitchell's chemiosmotic hypothesis, electron transport through the carriers of the inner mitochondrial membrane pumps protons () from the matrix into the intermembrane (perimitochondrial) space, producing a proton gradient

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Question ID VK-090065