In mitochondria, enzyme cytochrome oxidase is present in

Mitochondria contains various enzymes as follows : (i) Outer membrane Acetyltransferase, glycerophosphatase, phospholipase-A, monoamine oxidase, etc. (ii)Inner membrane Cytochrome oxidase, dehydrogenase, succinate NADH, dehydrogenase, ATPase, etc. (iii)Perimitochondrial space Adenylate kinase, nucleoside diphosphokinase, etc. (iv)Matrix Pyruvate dehydrogenase, citrate synthase, aconitase, isocitrate dehydrogenase, fumarase, $\alpha$-ketoglutarate dehydrogenase, malate dehydrogenase, etc.