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Which statement about single cell protein is FALSE?

  • A.It is protein extracted from oilseed cake
  • B.It is microbial biomass grown on a waste substrate
  • C.Its nucleic acid content limits how much can be fed
  • D.It can be grown on molasses or whey

Answer: A

Correct answer: It is protein extracted from oilseed cake

This is the false statement. Single cell protein is not extracted from anything - it is microbial biomass, grown deliberately, and the cells themselves are the product.

The other three are true: it is grown on a waste substrate such as molasses or whey, which is what makes it a by-product route; and its nucleic acid content limits the proportion that can safely be included in a diet, since the uric acid produced from it burdens the animal. Protein from oilseed cake is a quite different thing.

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