Q. 18.46 - An Introduction to General, Organic, and Biological Chemistry

Question

How are electrons carried from complex $\mathrm{III}$ to complex $\mathrm{IV}$?

Step-by-Step Solution

Answer

Electrons are transported from Complex $\mathrm{III}$ to Complex $\mathrm{IV}$ by cytochrome $\mathrm{c}$.

Step 1: Given information

We need to find out the electrons carrier of complex $\mathrm{IV}$ from complex $\mathrm{III}$

Step 2: Explanation

We know that

Electrons are transported from Complex $\mathrm{III}$ to Complex $\mathrm{IV}$ by cytochrome $\mathrm{c}$. The ${\mathrm{CoQH}}_2$ provides it with two electrons. The electrons are then transferred from Complex $\mathrm{III}$ to Complex $\mathrm{IV}$ by cytochrome $\mathrm{c}$.