Question

39) Most of the enzymes for the TCA cycle are located ______ while most of the electron transport chain complexes are located _______
A) in the mitochondrial matrix in the inner mitochondrial membrane
B) In the inner mitochondrial membrane; in the cytosol
C) in the cytosol; in the mitochondrial matrix
D) in the cytosol; in the inner mitochondrial membrane
E) in the mitochondrial matrix in the outer mitochondrial membrane

Answer 1

Most of the enzymes for the TCA cycle are located in the mitochondrial matrix, while most of the electron transport chain complexes are located in the inner mitochondrial membrane.

All the enzymes (except succinate dehydrogenase) required for TCA cycle are present in the mitochondrial matrix, while succinate dehydrogenase is present in the inner mitochondrial membrane.

Most of the enzymes required for ETC are located in the inner mitochondrial membrane, except cytochrome c oxidase which is a mobile enzyme floating in the intermembrane space.

Other options are wrong.

Any of the enzymes of TCA cycle and ETC are not present in the cytosol and outer mitochondrial membrane.