Marker enzyme of mitochondria are/is -: (A) Na+ – K+ ATPase, (B) Glutamate dehydrogenase, (C) Lactate dehydrogenase, (D) No specific enzyme
Answer is B. Markers of Plasma membrane - 5 '-Nucleotidase, Adenylyl cyclase, Na+ K+ ATPase
Marker of Endoplasmic reticulum- Glucose-6-phosphatase
Markers of Golgi apparatus- GlcNAc transferase 

Golgi mannosidase 
Galactosyltransferase, Sialyltransferase

Marker of Mitochondria- ATP synthase, Glutamate dehydrogenase
Marker of Peroxisome- Catalase
Marker of Cytosol- LDH