INTRODUCTION TO MICROSCOPY CELL BIOLOGY
MITOCHONDRIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which option correctly describes the relative pH in different parts of the mitochondria.
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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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Explanation:
Detailed explanation-1: -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. (Since small molecules equilibrate freely across the outer membrane of the mitochondrion, the pH in the intermembrane space is the same as in the cytosol.)
Detailed explanation-2: -The pH of the intermembrane space is about 7.0, whereas the pH of the matrix is about 8.0.
Detailed explanation-3: -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.
There is 1 question to complete.