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Microbial biomass grown on a waste substrate and used as a protein source is called _____ protein.

  • A.isolated
  • B.single cell
  • C.textured vegetable
  • D.hydrolysed

Answer: B

Correct answer: single cell

Single cell protein is microbial biomass - yeast, bacteria or fungi - grown on a cheap substrate and harvested for its protein. Molasses, whey and hydrolysates all serve, which is what makes it a by-product route rather than a primary process.

The organisms multiply quickly and are indifferent to climate and season, but the nucleic acid content of microbial cells limits how much can safely be included in a diet, which is the constraint that has kept the technology to feed rather than food in most applications.

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