Answer :
The correct answer for this question is Transcription factors.
A variety of genes regulate cell growth and division. The cell cycle is a methodical, step-by-step process by which the cell duplicates itself. Tight control of this process ensures that a dividing cell's DNA is properly copied, that any errors in the DNA are corrected, and that each daughter cell receives a complete set of chromosomes. Checkpoints (also known as restriction points) in the cell cycle enable certain genes to detect errors and pause the cycle for repairs if something goes wrong.
The amount of a protein in a cell at any one time indicates the balance between its production and degradative metabolic activities. On the synthetic side of this equilibrium, remember that protein production begins with transcription (DNA to RNA) and continues with translation (RNA to protein). Thus, managing these activities is critical in determining which proteins are present and in what quantities in a cell. Furthermore, the way a cell processes its RNA transcripts and newly generated proteins affects protein levels significantly.
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