testbank_4e_CH06 - Chapter 6 Enzymes Multiple Choice...

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Chapter 6 Enzymes Multiple Choice Questions 1. An introduction to enzymes Pages: 191-192 Difficulty: 1 Ans: A One of the enzymes involved in glycolysis, aldolase, requires Zn 2+ for catalysis. Under conditions of zinc deficiency, when the enzyme may lack zinc, it would be referred to as the: A) apoenzyme. B) coenzyme. C) holoenzyme. D) prosthetic group. E) substrate. 2. An introduction to enzymes Page: 192 Difficulty: 1 Which one of the following is not among the six internationally accepted classes of enzymes? 3. How enzymes work Page: 194 Difficulty: 2 Enzymes are potent catalysts because they: 4. How enzymes work Page: 194 Difficulty: 1 The role of an enzyme in an enzyme-catalyzed reaction is to:
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Chapter 6 Enzymes 61 5. How enzymes work Pages: 194-196 Difficulty: 2 Ans:D Which one of the following statements is true of enzyme catalysts? A) Their catalytic activity is independent of pH. B) They are generally equally active on D and L isomers of a given substrate. C) They can increase the equilibrium constant for a given reaction by a thousand fold or more. D) They can increase the reaction rate for a given reaction by a thousand fold or more. E) To be effective, they must be present at the same concentration as their substrate. 6. How enzymes work Pages: 194-196 Difficulty: 2 Which one of the following statements is true of enzyme catalysts?
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