Question

question 8
which of the following completes a false statement? the electron transport chain:
reduces oxygen to water
oxidizes fadh₂ to fad
actively pumps h⁺ into the matrix
is located in the inner mitochondrial membrane
accepts electrons from nadh

Explanation:

• In the electron transport chain, oxygen is the final electron acceptor and is reduced to water. So, "reduces oxygen to water" is a correct statement.
• \(FADH_2\) donates electrons to the electron transport chain and is oxidized to \(FAD\). So, "oxidizes \(FADH_2\) to \(FAD\)" is a correct statement.
• The electron transport chain actively pumps \(H^+\) out of the mitochondrial matrix (into the inter - membrane space), not into the matrix. So, "actively pumps \(H^+\) into the matrix" is a false statement.
• The electron transport chain is located in the inner mitochondrial membrane. So, "is located in the inner mitochondrial membrane" is a correct statement.
• \(NADH\) donates electrons to the electron transport chain. So, "accepts electrons from \(NADH\)" is a correct statement.

Answer:

actively pumps \(H^+\) into the matrix