The ultimate electron acceptor of respiration in an aerobic organism is

Options

A. cytochrome
B. oxygen
C. hydrogen
D. glucose

Answer

b

Explanation

The electron transport chain catalyses an electron flow from `NADH (FADH_(2))` to oxygen, which is the final electron acceptor of the respiratory process. It produces water in the mitochondrial matrix.
`NADH + H^(+) hArr NAD^(+) + 2H^(+) + 2e^(-)`
`FADH_(2) hArr FAD + 2H^(+) + 2e^(-)`
`(1)/(2)O_(2) + 2H^(+) + 2e^(-) rarr H_(2)O`