In alcoholism, this enzyme is elevated

The correct option is glutamyl transpeptidase.

Gamma-glutamyl transpeptidase (also known as GGT or gamma-glutamyl transferase) is a membrane-bound enzyme found in high concentrations in the liver, bile ducts, and kidney. It plays a significant role in the transfer of amino acids across cellular membranes and glutathione metabolism.

When a person consumes alcohol chronically or in large quantities, alcohol induces the synthesis of GGT in the liver cells (hepatocytes). Consequently, the levels of this enzyme in the bloodstream rise significantly. Because of this induction effect, GGT serves as a highly sensitive clinical biomarker for chronic alcohol abuse and alcohol-induced liver injury, even before other liver enzymes show significant elevation.

To understand why the other choices are incorrect:
1. Acid phosphatase: This is an enzyme primarily found in the prostate gland and bone, and its elevation is typically associated with prostate cancer or bone disorders, not specifically alcoholism.
2. Hepatitis: This is a disease or condition representing inflammation of the liver, not an enzyme.
3. Serum glutamate pyruvate transaminase (SGPT/ALT): While this is indeed a liver enzyme that can be elevated in various liver conditions, it is not as uniquely or sensitively induced by alcohol ingestion as glutamyl transpeptidase.