<prompt> Which is the marker enzyme for Endoplasmic reticulum?ATP synthase5 nucleotidaseCatalaseGlucose-6-phosphatase  <response>: ATP synthase is marker enzyme for mitochondria.5 nucleotidase is marker enzyme for plasma membrane.Catalase and urate oxidase is marker enzyme for peroxidase.Glucose-6-phosphatase is marker enzyme for Endoplasmic reticulum. 