CELL RESPIRATION
STRUCTURE OF THE MITOCHONDRION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Intermembrane space higher; matrix lower
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Matrix higher; intermembrane space lower
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Both are in equilibrium
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Varies depending on environment
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Detailed explanation-1: -Further, the pH of the mitochondrial matrix, determined with a EYFP targeted to this subcompartment, was 0.9 pH units higher than that in the intermembrane space.
Detailed explanation-2: -It generates a pH gradient across the inner mitochondrial membrane, with the pH higher in the matrix than in the cytosol, where the pH is generally close to 7.
Detailed explanation-3: -Intermembrane space tends to have a low PH because of the proton gradient which results when protons are pumped from the mitochondrial matrix into the intermembrane space during electron transport.
Detailed explanation-4: -This means that the protons need to be pumped across the inner mitochondrial membrane into the intermembrane space. This results in the intermembrane space having the lowest pH in the mitochondria, due to the high proton concentration.