Question

Regulation of the cell cycle is carried out by which
of the following? Check all that apply.
phosphate groups
CdKs
DNA
cyclins
amino acids

Answer 1

Answers:

"Regulation of the cell cycle is carried out by  CdKs (cyclin-dependent kinases)  and cyclins

Explanation :

cyclins and Cdks(cyclin-dependent kinases),  the two proteins groups  regulates the cell cycle through the different checkpoints. The cell cycle  regulation can  only  done when Cyclins are  tightly bound to Cdks. The initiation or regulation  events through phosphorylation of intracellular proteins is carried by  conserved set of cyclin-dependent kinases (Cdks).

This  guides  the cell cycle progression, terminal differentiation, and apoptosis. There  are 4 stages  cell cycle regulation. Each stage  is   controlled to make sure  precise DNA replication  and new daughter cells are formed. Each of  stages is  done along with  an increase in a specific type of cyclin.

Answer 2

Regulation of the cell cycle is carried out by CdKs and cyclins.

The internal control of the cell cycle is in charge of proteins, whose actions could be summarized in series of activations and inhibitions of other proteins, which are essential during the phases of the cycle.

The main effectors of this regulation are two:

• The cdk-cyclin complexes.

They are composed of 2 types of proteins, the cdk (cyclin-dependent kinase) and the cyclins (which go through a cycle of synthesis and degradation).

6 different combinations of cdk-cyclin are known that act at specific times during the cycle.

• Proteins, CIP and INK4.

The INK4 and CIP proteins, collectively called cdk inhibitors (CKIs), and some transcription factors (such as p53) have the function of preventing cell proliferation.

These proteins act in different periods of time, allowing or inhibiting the proper progress of the cell cycle.

Therefore, we can conclude that regulation of the cell cycle is carried out by the cdk-cyclin complexes, their inhibitors, among other proteins.

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