BIO314 Full Practice Exam 2

Which of the following statements regarding the

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18) Which of the following statements regarding the advantages of ubiquitin-regulated proteolysis is/are true? a) It is a bi-directional process, like phosphorylation and other post-translational modifications of proteins, and can thus be rapidly reversed. b) It is a rapid process, allowing for the elimination of protein molecules in a regulated fashion in a matter of minutes. c) It is a specific process, as a small set of proteins can be degraded without any effect on all other proteins. d) B & C. e) All of the Above. 19) In which phase of the cell cycle does DNA replication occur? 20) Which of the following Cyclin is NOT correctly paired with its dependent kinase? 21) CDK complexes vary thru the cell cycle. Which of the following situations would activate the complex to initiate mitosis in a normal functioning unit?
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22) Which of the following is true? a) The binding of a cyclin exposes the active site of a cyclin-dependent kinase b) A cyclin-dependent kinase is partially active prior to the binding of a cyclin c) Cdc25 phosphatase removes activating phosphates from CDKs d) Phosphorylation always activates CDK activity 23) Cyclin levels during the cell cycle: 24) Actions of CDK inhibitors:
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