Question

which features of the electron transport chain explain why it makes the most atp? (select the three correct answers.) (1 point)
it needs oxygen to take electrons at the end.
it is the first stage that splits one glucose molecule.
it uses high - energy electrons carried by nadh and fadh₂.
the process makes carbon dioxide as its main waste.
the process makes a large atp yield of about 34 molecules.
it happens in the cytoplasm outside the mitochondria.

Explanation:

1. Oxygen is the final electron - acceptor in the electron transport chain. This allows the flow of electrons to continue, which is crucial for ATP production through chemiosmosis.
2. NADH and FADH₂ carry high - energy electrons to the electron transport chain. As these electrons are passed through the chain, energy is released to pump protons across the inner mitochondrial membrane, creating a proton gradient used to make ATP.
3. The electron transport chain yields a large number of ATP molecules (about 34 per glucose molecule in aerobic respiration), which is more than other stages of cellular respiration. The first stage of glucose splitting is glycolysis, not the electron transport chain. Carbon dioxide is produced in the citric acid cycle, not mainly as a result of the electron - transport chain's unique ATP - making ability. The electron transport chain occurs in the inner mitochondrial membrane, not in the cytoplasm outside the mitochondria.

Answer:

It needs oxygen to take electrons at the end.
It uses high - energy electrons carried by NADH and FADH₂.
The process makes a large ATP yield of about 34 molecules.