Question

How would you describe what happens in the electron transport chain?

Answer 1

Different steps involved within the oxidation of glucose which are- Glycolysis, Krebs cycle and Electron transport chain. When glucose is totally oxidized in aerobic respiration, it produces 38 molecules of ATP.

Complete answer:
Electron transport chain: This is the last component of aerobic respiration that uses atmospheric oxygen. Electrons from glucose are transferred to small molecules called electron carriers. These electron carriers take electrons to a gaggle of proteins within the inner membrane of the mitochondrion, called the electron transport chain. When electrons move through this chain, they're going from higher to a lower energy and are then passed away to oxygen. Because the hydrogen ions flow back inside the mitochondria through energy is released to create ATP.

Oxidative phosphorylation can be defined as a metabolic pathway within which electrons are transferred from electron donors to electron acceptors in redox reactions; this series of reactions releases energy which is employed to create ATP.

There are four protein complexes (labeled complex I-IV) within the electron transport chain, which are involved in moving electrons from NADH and FADH2 to molecular oxygen.

Complex I establishes proton gradient by pumping four hydrogen ions across the membrane from the matrix into the intermembrane space.

1.Complex II receives $FADH_2$ , which bypasses complex I, and delivers electrons onto the electron transport chain.
2.Ubiquinone (Q) accepts the electrons from both complex I and sophisticated II and delivers them to complex III.
3.Complex III pumps protons through the membrane and passes its electrons to cytochrome for transport to the fourth complex of proteins and enzymes.
4.Complex IV reduces oxygen; the reduced oxygen then picks up two hydrogen ions from the encircling medium to form water.

Note: Chemiosmosis: During this free energy from a series of redox reactions is utilized in pumping the hydrogen ions across the membrane. The uneven distribution of H+ ions across the membrane establishes both concentration and electrical charge attributable to hydrogen ions’ electric charge and their aggregation on one side of the membrane.