What is the definition of final electron acceptor?

Answer 1

An electron acceptor is a molecule or atom that can be reduced by gained an electron from something else. It is also called an electrophile or an oxidizing agent. Common strong electron acceptors are O2, Cl2, Br2, MnO42-, PbO2, Co3+, Cr2O72-, H2O2. In a table of standard redox potential, they are the species with the most positive reduction potentials.

The Lewis definition of bases is described in terms of electron acceptors and donors. A electron pair acceptor is an acid, and an electron pair donor is a base.

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Answer 2

A final electron acceptor is a molecule that accepts an electron at the final stage of an electron transport chain.

In cells, energy is obtained by oxidation reactions. Oxidation involves a loss of electrons from the substance being oxidized, and these electrons are passed to carriers.

In mitochondria, the compounds of the electron transport chain are embedded in the inner membrane. The final acceptor of the electrons is oxygen, which is reduced to water:

2 H+ + 1/2 O2 ---> H2O

Answer 3

It is an atom or part of a molecule joined by a covalent bond to an electron donor.

In aerobic respiration it is oxygen

In fermentation it is pyruvate

In anaerobic respiration it is an inorganic substance (like sulfur)

In light-dependant reactions it is NADP

Hope that answers your question!

Answer 4

If this is referring to an AP Biology question with the electron transport chain or glycolysis (etc), then the answer would be oxygen (or O2)