ch19_pt - Ch19_PT MULTIPLE CHOICE Choose the one...

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Ch19_PT MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)Enzymes are members of which class of biomolecules? A)carbohydrates B)nucleic acids C)proteins D)steroids E)lipids 1) 2)What is the function of enzymes? 2) 3)The reactant in an enzyme - catalyzed reaction is called the 3) 4)All of the following phrases correctly describes enzymes except 4) 5)The tertiary structure of most enzymes is A)a β - pleated sheet. B)globular. C)an α - helix. D)fibrous. E)none of these. 5) 6)The maximum number of substrate molecules that one enzyme molecule can act on in a given unit of time is the 6) 7)Which term identifies the relatively small portion of the enzyme that is directly involved in the biochemical reaction being catalyzed? 7) 1
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8)Enzymes function as catalysts by 8) SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 9)Explain the term specificity as it applies to enzyme activity. 9) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 10)The nonprotein portion required by some enzymes for proper functioning is called a(an) A)zymogen. B)activator. C)inhibitor. D)cofactor. E)substrate. 10) 11)Which aspect of enzyme structure is related to our dietary need for trace minerals? A)cofactor B)chirality C)active site D)turnover number E)none of these 11) 12)The name of an enzyme can often be recognized by the ending 12) 13)An enzyme that catalyzes addition or removal of hydrogen or oxygen on substrate molecules is a(an) ________. 13)
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