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Feeder cells are sometimes used in culture in order to

  • A.supply factors that the cultured cells require
  • B.consume the waste products of the whole culture
  • C.provide a source of food to be eaten by the cells
  • D.prevent the culture medium from evaporating away

Answer: A

A layer of treated cells that cannot themselves divide supplies signals and matrix for the cells of interest. Defined media have replaced them in many applications but not all. Some stem cell work still depends on a feeder layer.

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