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17. The two types of cell cycle genes that, if mutated, cause cancer cells to divide...

17. The two types of cell cycle genes that, if mutated, cause cancer cells to divide uncontrollably are called tumor suppressor genes and
    
A. growth factors.
B. cancer genes.
C. telomeres.
D. proto-oncogenes.
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The two types of cell cycle genes that, if mutated, cause cancer cells to divide uncontrollably are called tumor suppressor genes and

D.Proto-oncogenes.

explaination- proto-oncogene is a normal gene which,when altered by mutation,becomes an oncogene that can contribute to cancer.

The overactive forms of these genes are called oncogenes,while the normal ,not-yet mutated forms are called proto-oncogenes.

mutations that turn proto-oncogenes into oncogenes can take different forms.some change the amino acid sequence of the protein,altering its shape.

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