Where do the reactions of the electron transport chain occur? A. Inside the cell membrane. B. Within the cell’s cytoplasm. C. Within the mitochondria’s inner membrane. D. Within the mitochondria’s matrix. Make sure your answer is correct! Plz

2 answers
Question:

Where do the reactions of the electron transport chain occur?
A. Inside the cell membrane.
B. Within the cell’s cytoplasm.
C. Within the mitochondria’s inner membrane.
D. Within the mitochondria’s matrix.
Make sure your answer is correct! Plz

Answers

Within the mitochondrion’s inner membrane

The right answer is C. Within the mitochondria’s inner membrane. The mitochondrion is limited by two membranes of very different properties: * the outer membrane contains a transmembrane protein, porin, which allows the passage of ions and water-soluble metabolites of molar mass <10.000 Da. * The inner membrane is very rich in proteins and almost impermeable to ions and water-soluble metabolites. The respiratory chain or electron transport chain is located in the inner membrane of mitochondria. Each mitochondrion contains thousands of copies of the electron transport chain.

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