Question

Which of the following statements about the electron transport chain is true? View Available Hint(s) Which of the following statements about the electron transport chain is true? a) Water is the last electron acceptor. b) NADH and FADH2 donate their electrons to the chain. c) The electron transport chain is the first step in cellular respiration. d) Electrons gain energy as they move down the chain.

Answer 1

Answer: B

Explanation:

Co Enzymes NAD+and FADH+ are the electron carriers as NADH and FADH2.

The electrons are locked in hydrogen atoms the carry.

The Hydrogen atoms is split into

Pronton(H) and electons(e-).

It is these electrons that move in chains through the protein carriers to generate energy for pumping protons across the intra membranes of the mitochondrial or chloroplasts for ATP synthsis by the ATPs synthase.

Answer 2

NADH and FADH2 donate their electrons to the chain is the statement that is true about the electron transport chain.

The enzymes that catalyze the reactions of the Krebs cycle are found in the mitochondrial matrix; while the electron transport system is found in the mitochondrial ridges.

The Krebs cycle releases energy that is collected either in the form of ATP (Adenine triphosphate) or in NADH (nicotinamide adenine dinucleotide) or FADH (Flavin adenine dinucleotide).

The electron chain is made up of 4 complexes, complexes I, III and IV are found crossing the membrane, while complex II is only anchored to it.

Complex I of the chain is able to use the reducing power of NADH or FADH to transfer protons into the membrane of thylakoids or mitochondria.

In addition, complex I captures electrons from NADH or FADH, these electrons will give them to complex III to activate it and also transport electrons and this will give them to complex IV for the same purpose.

Therefore, we can conclude that NADH and FADH2 donate their electrons to the chain is the statement that is true about the electron transport chain.

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