Cancerous tumors in eukaryotes result from the overgrowth of cells due to disruptions in the control of the cell cycle.
If we analyzed the chemical makeup of cancerous cells, altered levels of which of the following would be likely?

Cyclin dependent kinase

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Restriction endonuclease

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DNA ligase

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Topoisomerase

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Solution

The correct option is A Cyclin dependent kinase
Cancerous tumors in eukaryotes occurs due to over expression of CDK4, CDK6 and also CDK2 in humans. It also depends on inhibition of expression of p21 and p27.
So, the correct answer is 'Cyclin dependent kinase'

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