Which of the following statements about the electron transport chain is true? Group of answer choices A) It is driven by ATP hydrolysis. B) It includes a series of hydrolysis reactions associated with mitochondrial membranes. C) It consists of a series of redox reactions D) It occurs in the cytoplasm of both prokaryotic and eukaryotic cells.

Sourav PanDecember 12, 2024

Answered

The correct statement is:

C) It consists of a series of redox reactions.

Explanation:

• A) It is driven by ATP hydrolysis: This is incorrect. The electron transport chain is not driven by ATP hydrolysis but by the energy released from the transfer of electrons through the complexes of the chain. This energy is used to pump protons across the membrane.
• B) It includes a series of hydrolysis reactions associated with mitochondrial membranes: This is incorrect. The electron transport chain involves redox (oxidation-reduction) reactions, not hydrolysis reactions.
• C) It consists of a series of redox reactions: This is correct. The electron transport chain involves a series of redox reactions, where electrons are transferred between protein complexes, leading to the generation of a proton gradient.
• D) It occurs in the cytoplasm of both prokaryotic and eukaryotic cells: This is incorrect. In eukaryotic cells, the electron transport chain occurs in the inner mitochondrial membrane. In prokaryotic cells, it occurs in the cell membrane.