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The entry of a cell into M phase is initiated by _________________

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The entry of a cell into M phase is initiated by _________________

(a) interleukin factor

(b) maturation promoting factor

(c) transcription factor

(d) necrosis factor

I have been asked this question by my school principal while I was bunking the class.

This question is from Cellular Reproduction in portion DNA Replication and Repair, Cellular Reproduction of Cell Biology

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The correct choice is (b) maturation promoting factor

The explanation is: The entry of a cell into mitotic (division or M phase) phase is initiated by the maturation promoting factor (MPF). It consists of two subunits – one with kinase activity and the other with regulatory activity.

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