This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Enzymatic markers of plasma membrane include all except 
Select and explain. 
A. 5'-nucleotidase, B. Adenylyl cyclase, C. Na+-K+-ATPase, D. Galactosyl transferase
D: Galactosyl transferase
Answer: D: Galactosyl transferase 
Explanation: Markers of Plasma membrane - 5-Nucleotidase, Adenylyl cyclase, Na+K+ ATPase
Marker of Endoplasmic reticulum - Glucose-6-phosphatase
Markers of Golgi apparatus - GlcNAc transferase I, Golgi mannosidase II, Galactosyl transferase, Sialyltransferase
Marker of Mitochondria - ATP synthase, Glutamate dehydrogenase
Marker of Peroxisome - Catalase.
Marker of Cytosol - LDH.