Answer:
Genetic mutations causing the malfunction or absence of one or more of the regulatory proteins at cell cycle checkpoints can result in the "molecular switch" being turned permanently on, permitting uncontrolled multiplication of the cell, leading to carcinogenesis, or tumor development.
Explanation:
Because, it helps you exceed.
B <span>when a person is on life support and doctors decide to stop life support
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True...........................................................
Is it multiple answer?? Because if so I would pick b and d
