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Proteins called internal regulators and external regulators control the cell cycle. Internal regulatory proteins allow the cell cycle to proceed only when certain events have occurred in the cell itself. External regulatory proteins direct cells to speed up or slow down the cell cycle.

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11y ago
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9y ago

Specialized proteins that both regulate the cell cycle and cause it to occur are called cyclins. Cyclins can also tell the cell when it needs to separate or divide.

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Q: What are specialized proteins that both regulate the cell cycle and cause it to occur?
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