alleryThe Krebs cycle takes place in
Athe cytoplasm of the cell
Bthe chloroplast stroma
Cthe nuclear envelope
Dthe mitochondrial matrix
Answer & Solution
Correct answer: D. the mitochondrial matrix
The Krebs (citric-acid / TCA) cycle runs in the mitochondrial matrix.
Pyruvate moves from cytoplasm into the matrix to enter the cycle.
The electron-transport chain that follows is on the inner mitochondrial membrane, not the matrix.
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