Question

According to this reaction:

4cyst c2+ + 8H+matrix + O2 → 4cys c3+ + 2H2O + 4H+cytosol; Humans produce about 300 ml of "metabolic water" per day. Which electron-transport complex is this referring?

Answer 1

Complex IV is responsible for the conversion of oxygen into water and the production of metabolic water. It contains cytochrome proteins, heme groups, and copper ions.

Step-by-step explanation:

According to the given reaction, the production of 300 ml of metabolic water per day corresponds to the process of converting oxygen into water. This reaction occurs in Complex IV, also known as cytochrome c oxidase, which is the final complex in the electron transport chain.

Complex IV contains cytochrome proteins c, a, and a3, as well as two heme groups and three copper ions. It reduces oxygen into water by picking up two hydrogen ions from the surrounding medium. The removal of these hydrogen ions from the system contributes to the ion gradient used in the process of chemiosmosis.