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Which ions activate cyclin-dependent kinases, following fertilization?

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Which ions activate cyclin-dependent kinases, following fertilization?

(a) Ca^2+

(b) Mg^2+

(c) Fe^3+

(d) H^+

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Enquiry is from Cell Signaling and Signal Transduction in division Cell Signaling and Signal Transduction of Cell Biology

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Right answer is (a) Ca^2+

To elaborate: The rise in cytoplasmic calcium concentration following fertilization triggers a diverse array of events. Activation of cyclin-dependent kinases that drive the zygote towards first mitotic division is one such event.

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