A mutation has occurred during mitosis of an individual's bone marrow cell. This event may be the result of the failure of which of the following?
A) Progenitor cells
B) Fibroblasts
C) Stem cells
D) Cyclins
Ans: D
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The cyclins are a family of proteins that control the entry and progression of cells through the cell cycle, the failure or absence of which may result in mutations. Fibroblasts do not contribute to the cell cycle, and neither progenitor cells nor stem cells are likely to directly contribute to mutation.
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