Which of the following is a substrate specifically associated with alkaline phosphatase?

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Multiple Choice

Which of the following is a substrate specifically associated with alkaline phosphatase?

Explanation:
Alkaline phosphatase requires a phosphate-containing substrate that the enzyme hydrolyzes to initiate color development. Naphthol-AS-phosphate fits this role because AP cleaves the phosphate group, releasing naphthol that then couples with a diazonium salt to form a colored, insoluble precipitate at the site of the antigen. In contrast, hydrogen peroxide is used with peroxidases as an oxidant, and 3,3'-diaminobenzidine and tetramethylbenzidine are chromogens that produce color only when oxidized by peroxidase in the presence of hydrogen peroxide. Therefore, the substrate specifically associated with alkaline phosphatase is Naphthol-AS-phosphate.

Alkaline phosphatase requires a phosphate-containing substrate that the enzyme hydrolyzes to initiate color development. Naphthol-AS-phosphate fits this role because AP cleaves the phosphate group, releasing naphthol that then couples with a diazonium salt to form a colored, insoluble precipitate at the site of the antigen. In contrast, hydrogen peroxide is used with peroxidases as an oxidant, and 3,3'-diaminobenzidine and tetramethylbenzidine are chromogens that produce color only when oxidized by peroxidase in the presence of hydrogen peroxide. Therefore, the substrate specifically associated with alkaline phosphatase is Naphthol-AS-phosphate.

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