CELL RESPIRATION
STRUCTURE OF THE MITOCHONDRION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cristae
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matrix
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inner boundary membrane
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outer membrane
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Detailed explanation-1: -The inner membrane of mitochondria is organized in two morphologically distinct domains, the inner boundary membrane (IBM) and the cristae membrane (CM), which are connected by narrow, tubular cristae junctions.
Detailed explanation-2: -Mitochondria are bounded by a double-membrane system, consisting of inner and outer membranes. Folds of the inner membrane (cristae) extend into the matrix.
Detailed explanation-3: -The inner membrane is freely permeable to oxygen, carbon dioxide, and water only. It is much less permeable to ions and small molecules than the outer membrane, creating compartments by separating the matrix from the cytosolic environment. This compartmentalization is a necessary feature for metabolism.
Detailed explanation-4: -The inner mitochondrial membrane consists of numerous copies of a protein molecule termed the F0F1ATPase. It is also known as ATP synthase. It has two components: the F0 component extends the membrane and creates a pathway for protons to enter the matrix.