Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter23: Organic Polymers, Natural And Synthetic
Section: Chapter Questions
Problem 27QAP
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![QUESTION 21
A plot of activity versus pH for an enzyme that functions in the cytosol of a cell at pH of about 7 would probably
O A. Show the highest activity between pH of 4 and 6
O B. Show the lowest activity at pH of about 7 to 8
C. Have the highest activity around a pH of 7
D. Look about the same as an enzyme like pepsin that functions in the stomach at a pH of about 1
Show the same activity at every pH between 4 and 10
E.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2e06c0ab-6613-491a-b02c-83373b434464%2Fb29838b6-42c5-47d0-9a18-948419482348%2F1y58eh_processed.png&w=3840&q=75)
Transcribed Image Text:QUESTION 21
A plot of activity versus pH for an enzyme that functions in the cytosol of a cell at pH of about 7 would probably
O A. Show the highest activity between pH of 4 and 6
O B. Show the lowest activity at pH of about 7 to 8
C. Have the highest activity around a pH of 7
D. Look about the same as an enzyme like pepsin that functions in the stomach at a pH of about 1
Show the same activity at every pH between 4 and 10
E.
![QUESTION 22
The enzyme acetylcholine esterase catalyzes the hydrolysis of acetylcholine, producing choline and acetate. It has a mechanism that involves a catalytic
triad in which a which a nucleophilic serine first attacks the C=O of the ester linkage in acetylcholine. When acetylcholine esterase is exposed to diisopro
pylphosphofluoridate, one can therefore expect:
O A. Diisopropylphosphofluoridate to be bound loosely (reversibly) at the active site of acetylcholinesterase
O B. An increase in the hydrolysis of acetylcholine
O C.A decrease in the activity of acetylcholine esterase
O D. Covalent bonds to form between diisopropylphosphofluoridate and acetylcholine](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2e06c0ab-6613-491a-b02c-83373b434464%2Fb29838b6-42c5-47d0-9a18-948419482348%2F2s0stak_processed.png&w=3840&q=75)
Transcribed Image Text:QUESTION 22
The enzyme acetylcholine esterase catalyzes the hydrolysis of acetylcholine, producing choline and acetate. It has a mechanism that involves a catalytic
triad in which a which a nucleophilic serine first attacks the C=O of the ester linkage in acetylcholine. When acetylcholine esterase is exposed to diisopro
pylphosphofluoridate, one can therefore expect:
O A. Diisopropylphosphofluoridate to be bound loosely (reversibly) at the active site of acetylcholinesterase
O B. An increase in the hydrolysis of acetylcholine
O C.A decrease in the activity of acetylcholine esterase
O D. Covalent bonds to form between diisopropylphosphofluoridate and acetylcholine
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