<prompt> Site of Krebs cycle -CytoplasmMitochondriaSmooth Endoplasmic reticulumNucleus  <response>: Ans. is b i.e., Mitochondria Krebs cycle or citric acid cycle is the final oxidation pathway wherein all three fuels, carbohydrates, lipids and proteins get oxidised to form Carbondioxide. It happens in mitochondria. 