The haem protein complexes,which act as oxidizing agents are known as

In the electron transport chain,which of the following is a small protein and acts as a mobile carrier for electron transfer?

During aerobic respiration,the total number of $ATP$ formed through oxidative phosphorylation / $ETS$ from one glucose molecule is . . . . . . .

In oxidative photophosphorylation,the last $3$ steps are as follows: $Q \to C \to aa_3 \to O_2$. Which of the following statements is correct regarding the proton $(H^+)$ movement?

Match the following columns regarding the Electron Transport System $(ETS)$:

Column-$I$ ($ETS$ Complex)	Column-$II$ (Name of Complex)
$P$. Complex-$I$	$I$. Cytochrome $c$ oxidase complex
$Q$. Complex-$II$	$II$. Cytochrome $bc_1$ complex
$R$. Complex-$III$	$III$. $ATP$ synthase complex
$S$. Complex-$IV$	$IV$. $FADH_2$ dehydrogenase complex
$T$. Complex-$V$	$V$. $NADH$ dehydrogenase complex

In mitochondria,the proton gradient is established in which direction?