Q71: Sodium/Potassium ATPase is the marker enzyme for. - Cell Organization, Biomembranes, Chromatin & Acid-Base Buffers - Veterinary Biochemistry- ICAR JRF/SRF 2024 | Agrigyan

• Plasma Membrane Marker: $\text{Na}^+/\text{K}^+$-ATPase (sodium-potassium pump) is an integral transmembrane P-type ATPase found exclusively in the plasma membrane of animal cells, actively pumping $3\text{ Na}^+$ out and $2\text{ K}^+$ in per ATP hydrolyzed.
• Other Organelle Markers:
• Mitochondria: Succinate dehydrogenase (inner membrane) and Cytochrome c oxidase.
• Lysosomes: Acid phosphatase.
• Cytosol: Lactate dehydrogenase (LDH).
• Endoplasmic Reticulum: Glucose-6-phosphatase.
• Golgi Apparatus: Galactosyltransferase.

Correct option: (1) Plasma membrane