The last or terminal cytochrome in the respiratory chain is

$A-$ $ATPase$ is a multienzyme complex containing two parts $F_0$ and $F_1$.
$R-$ The $F_1$ headpiece is a peripheral membrane protein complex and contains the site for synthesis of $ATP$ from $ADP$.

The process by which $ATP$ is produced in the inner membrane of a mitochondrion,where the electron transport system transfers protons from the inner compartment to the outer,and as the protons flow back to the inner compartment,the energy of their movement is used to add phosphate to $ADP$,forming $ATP$,is known as:

Electron transport system occurs in $:-$

Which of these are respiratory poisons or inhibitors of electron transport chain?

What is ubiquinol?