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Biurete and triurete crystals of Amoeba are formed of:

  • A.Urea
  • B.Uric acid
  • C.Guanine
  • D.Carbonyl diurea

Answer: D

Correct answer: Carbonyl diurea

The biuret and triuret crystals of the amoeba’s cytoplasm are carbonyl diurea, a nitrogenous waste product. They accumulate as excretory granules and are voided at the cell surface, the amoeba having no organ of excretion beyond the general membrane and the contractile vacuole.

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