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Which of the following catalyze liberation of orthophosphate from organic P compounds and inorganic pyrophosphate ?

  • A.Alkaline phosphatase
  • B.Oxidoreductase
  • C.Protease
  • D.Hydrogenase

Answer: A

Correct answer: Alkaline phosphatase

Alkaline phosphatase hydrolyses phosphate esters and inorganic pyrophosphate, releasing free orthophosphate, and works best at alkaline pH. Bacteria induce it when phosphate is scarce, so that organic sources can be scavenged.

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