Respiratory enzymes are present in

The number of substrate level phosphorylations $(SLP)$ for one molecule of glucose in the citric acid cycle is:

The enzyme mediating the reactions of the $Krebs$ cycle during cellular respiration in animals is found in:

Almost all the enzymes that participate in the Krebs cycle are found in the ...... .

Match the enzyme involved in the Krebs cycle given in column-$I$ with the reactions they catalyse given in column-$II$. Choose the correct option.

Column $I$	Column $II$
$i.$ Isocitrate dehydrogenase	$a.$ Citrate $\rightarrow$ Cis-aconitate
$ii.$ Fumarase	$b.$ Succinate $\rightarrow$ Fumarate
$iii.$ Aconitase	$c.$ Fumarate $\rightarrow$ Malate
$iv.$ Succinate dehydrogenase	$d.$ Isocitrate $\rightarrow$ Oxalosuccinic acid

The Krebs cycle starts with the formation of a six-carbon compound by the reaction between: