AP BIOLOGY

Detailed explanation-1: -During the electron transport chain, the oxygen is the final acceptor of electrons. Oxygen after accepting the electron turns reactive and undergoes the reduction with the protons present in the matrix. Later this combination forms metabolic water.

Detailed explanation-2: -Figure 1 The electron transport chain is a series of electron transporters embedded in the inner mitochondrial membrane that shuttles electrons from NADH and FADH2 to molecular oxygen. In the process, protons are pumped from the mitochondrial matrix to the intermembrane space, and oxygen is reduced to form water.

Detailed explanation-3: -The electrons flow through the electron transport chain, causing protons to be pumped from the matrix to the intermembrane space. Eventually, the electrons are passed to oxygen, which combines with protons to form water.

Detailed explanation-4: -Oxygen is the final electron acceptor in this respiratory cascade, and its reduction to water is used as a vehicle by which to clear the mitochondrial chain of low-energy, spent electrons.

Detailed explanation-5: -The statement is false. The electron transport chain takes electrons from NADH and FADH2 and shuttles them through electron transport carrier proteins embedded in the inner mitochondrial membrane. The terminal electron acceptor is molecular oxygen, which becomes reduced to water.