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Discussion

Rancidity in nuts and fats produced by microbial action results from

  • A.fermentation of the sugars present
  • B.reduction of nitrate to nitrite
  • C.breakdown of the protein fraction
  • D.hydrolysis of fats by microbial lipases

Answer: D

Lipolytic organisms split the triglycerides and release free fatty acids, which give the characteristic taint. Oxidative rancidity is a separate, purely chemical process driven by oxygen and light rather than by organisms.

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