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To prevent the accumulation of lactate

  • A.low glutamine concentration is required
  • B.high glutamine concentration is required
  • C.low glucose concentration is required
  • D.high glucose concentration is required

Answer: C

Correct answer: low glucose concentration is required

Lactate comes from glucose, and cells ferment more of it the more there is - even when oxygen is plentiful. Keeping the glucose concentration low, by feeding it gradually rather than supplying it all at once, forces the cells to oxidise what they get and so limits lactate. That is the principle of fed-batch culture.

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