Oxidative phosphorylation is

The following is a scheme showing the electron transport system. Identify the electron carrier molecules indicated as $\mathrm{A}$ and $\mathrm{B}.$ Choose the correct option

The enzymes for electron transport system are located in the

Or

Cellular energy is provided through respiration and oxidation by

The last or terminal cytochrome in respiratory chain is

Or

In an electron transport chain in terminal oxidation the cytochrome which donates electrons to ${\mathrm{O}}_2$ is