Which of the following CdKs and cyclins comes | vedclass

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(C) The cell cycle is regulated by enzymes known as cyclin-dependent kinases $(CdKs)$.$CdKs$ phosphorylate specific amino acids, such as serine and th

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Both $(a)$ and $(b)$

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(C) The cell cycle is regulated by enzymes known as cyclin-dependent kinases $(CdKs)$.$CdKs$ phosphorylate specific amino acids, such as serine and threonine, which either initiate or inhibit activities related to the cell cycle.Key checkpoints in the cell cycle include:$1.$ The $G_{1}$ checkpoint (entry into the $S$ or synthesis phase) is controlled by $CdK_{4} / 	ext{Cyclin } D$ and $CdK_{6} / 	ext{Cyclin } D$.$2.$ The $G_{2}$ checkpoint (entry into the $M$ phase or maturation-promoting factor) is controlled by $CdK_{2} / 	ext{Cyclin } B$.$3.$ The metaphase checkpoint is controlled by the degradation of $	ext{Cyclin } B$.

Which of the following $CdKs$ and cyclins comes under the $G_{1}$ checkpoint?

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