<prompt> All of the following TCA cycle enzymes are located in the mitochondrial matrix, EXCEPTAlpha-ketoglutarate dehydrogenaseIsocitrate dehydrogenaseSuccinate dehydrogenaseMalate dehydrogenase  <response>: Ans. cSuccinate dehydrogenase All the TCA cycle enzymes are present in the mitochondrial matrix except succinate dehydrogenase complex II of ETC Succinate dehydrogenase is embedded in the inner mitochondrial membrane. NOTE: Complex I pumps 4 protons. Complex II doesnt pump any proton. Complex III pumps 4 protons. Complex IV pumps 2 protons. 