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The inner membrane of a mitochondrion is folded into
Athylakoids
Bmatrix
Cgrana
Dcristae
Answer & Solution
Correct answer: D. cristae
The inner mitochondrial membrane is thrown into folds called cristae. The folds pack more surface area for the electron transport chain. Thylakoids and grana belong to chloroplasts; the matrix is the inner fluid of the mitochondrion.
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