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State whether the following is true or false.
Differentiating a stem cell in culture usually involves changing the signals in the medium.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: C

Adding or withdrawing particular growth factors directs the cells towards one lineage rather than another. The recipe differs for each target cell type and is often arrived at empirically. Protocols are refined by trial rather than derived from first principles.

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