A) A genetic mutation can cause unrested cell division: This behavior characterizes in particular the majority of cells Cancerous. Which organelle plays an important role in this function?
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Several scenarios are described in the questions below. For each scenario, determine whether or not the change described would contribute to uncontrolled cell division (i.e., cancer). Answer choices [A or B] may be used more than once or not at all. 24. A mutant CDK that is active in the absence of its cyclin binding partner. a. This would contribute to uncontrolled cell division. b. This would not contribute to uncontrolled cell division. 25. A defective cyclin that cannot bind to its CDK. a. This would contribute to uncontrolled cell division. b. This would not contribute to uncontrolled cell division. 26. A loss of function mutation in an enzyme that is normally needed for microtubule synthesis/polymerization. a. This would contribute to uncontrolled cell division. b. This would not contribute to uncontrolled cell division.
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The Atavistic Hypothesis effectively says that (pick one): A) Most cancers are a result of a failure of more recently evolved genes to properly regulate more primitive genes. B) Most cancers occur because of mutations in genes that cause cells to divide. C) Mutation rates in protists are higher than in multicellular organisms.
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