Cytochrome $a$ is a/an:

How many $ATP$ molecules are produced during oxidative phosphorylation from one molecule of $NADH + H^+$ and $FADH_2$ respectively?

Which process is common to both respiration and photosynthesis?

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

Both respiration and photosynthesis require ......... .

The complex $II$ of mitochondrial electron transport chain is also known as