Question

Our body produce about 300 ml of ""metabolic water"" daily, mainly due to the reaction shown.

4cyt c₂+ + 8Hₘₐₜᵣᵢₓ+ O₂ --> 4cys c3+ + 2H₂O + 4H+ᵧₜₒₛₒₗ
Which electron transport complex participates in the above reaction?
Which electron transport complex participates in the above reaction?
a) Complex I
b) Complex II
c) Complex III
d) Complex IV

Answer 1

The electron transport complex that participates in the reaction where oxygen is reduced to water, contributing to metabolic water production, is Complex IV, also known as cytochrome c oxidase.

Step-by-step explanation:

The reaction you've described involves the reduction of oxygen to form water, which happens in the electron transport chain, specifically at Complex IV, also known as cytochrome c oxidase. This complex contains cytochrome proteins c, a, and a3, with two heme groups and three copper ions. Complex IV is responsible for using the energy from electrons to pump hydrogen ions to the intermembrane space and facilitates the reduction of oxygen to water, finalizing the electron transport chain's role in oxidative phosphorylation.