Which of the following about the intermembrane space in Mitochondria are correct

Question

Which of the following about the intermembrane space in Mitochondria are correct?
Please exaplain.

Select ALL of the following which are correct. In mitochondria, the intermembrane space: provides a compartment for protons to be pumped into. contains ribosomes. is of a relatively small volume which helps to prevent a concentration gradient being generated. is of a relatively small volume which enables a concentration gradient to be more easily generated. is of a relatively large volume which enables a greater concentration of protons to be accumulated. contains mitochondrial DNA. is where glycolysis takes place. is important for the process of oxidative phosphorylation.

Explanation / Answer

(1) The space between the inner and the outer membrane of a mitochondrion is the inter-membrane space. It has a low pH because of the proton gradients which is useful for pumping protons from the mitochondrial matrix into the inter-membrane space during electron transport.
(2) The inter-membrane space id of relatively large volume which enables a greater concentration of protons to be accumulated.
(3) The main function of mitochondrial inter-membrane space is oxidative phosphorylation.

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