22. The inactive precursor that can be covalently modified to generate an active protease is known as a(n): a. activator b. cofactor c. zymogen d. coenzyme e. none of the above
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Select the true statements about zymogens. Activation of zymogens through proteolytic cleavage is a reversible process. Zymogens are inactive precursors that are cleaved to activate an enzyme. Proteolytic enzymes are initially synthesized as zymogens to prevent off-target activity. Protease enzymes are the only enzymes activated by proteolytic cleavage. Proteolytic cleavage at a specific site on the zymogen causes conformational changes that expose the active site of the enzyme.
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Why do effector/executioner caspases 3 and 7 need to be cleaved by initiator caspases? A. These are tetrameric complexes that need to be scaffolded in order to be activated B. These are monomeric zymogens that are catalytically inactive as proteases C. These are dimeric zymogens that are catalytically inactive as proteases D. Phosphorylation preferentially activates dimeric zymogens E. None of the above
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