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A primary culture is one that has been

  • A.established directly from tissue and not yet passaged
  • B.passaged many times over the course of several years
  • C.derived from the tumour of a particular named patient
  • D.grown without any nutrient medium being supplied at all

Answer: A

It retains many characteristics of the original tissue but has a limited lifespan. Once it is subcultured for the first time it becomes a cell line rather than a primary culture. The distinction matters because behaviour changes at that point.

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