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Which of the following is not one of the major transport systems of the inner mitochondrial membrane?

A) sodium-potassium pump
B) dicarboxylate carriers
C) tricarboxylate carriers
D) pyruvate carrier cotransport
E) ATP-ADP carrier exchange

User Shiladitya
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1 Answer

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Final answer:

The sodium-potassium pump is not one of the major transport systems of the inner mitochondrial membrane, as it is a plasma membrane feature in animal cells, using ATP to maintain ion concentration gradients.

Step-by-step explanation:

The inner mitochondrial membrane contains several transport systems that are essential for cellular respiration and energy production. These include dicarboxylate carriers, tricarboxylate carriers, pyruvate carrier cotransport, and ATP-ADP carrier exchange. These transport mechanisms are crucial for moving substances across the mitochondrial membrane, contributing to processes like the electron transport chain and ATP synthesis.

However, the sodium-potassium pump is not one of these transport systems. This pump is a form of active transport present in the plasma membrane of all animal cells that functions to maintain the necessary concentration gradients of sodium and potassium ions across the cell membrane. It uses energy from ATP to move sodium and potassium ions against their concentration gradients.

In evaluation of the choices provided in the question, option A) sodium-potassium pump is therefore the correct answer as it is not part of the inner mitochondrial membrane's major transport systems.

User Hong Jiang
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