The role of Zn2+ in catalysis is usually to:a. Stabilize a (-) charge in the transition stateO b. Act as a nucleophileOc. Act as a baseOd. Destabilize a (-) charge in the transition state

Proteins include zinc, which is either essential for preserving protein stability and structure or…

Answered: The role of Zn2+ in catalysis is…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Draw a stepwise mechanism for the following reaction. The fourmemberedring in the starting material and product is called a β-lactam.This functional group confers biological activity on penicillin and many related antibiotics. (Hint: The mechanism begins with β elimination and involves only two steps.)
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Which of the following describe what enzymes such as Chymotrysin accomplish to allow products to form and be released by the enzyme active site? Group of answer choices catalyze chemical eactions that are thermodynamically unfavorable to occur establish a more stable transition state at a higher energy level to perform a catalysis reaction redce the chemical energy held within a chemical bond modify chemical structure of a substrate to "fit" within the active site
Which of the following best explains why enzyme catalysis is affected by a change in pH? A. Change in pH alters ionization states of serine in the active site involved in nucleophilic catalysis B. The ionization states of his, asp and glu involved in acid/base catalysis are altered with change in pH C. Change in pH alters ionization states of contact amino acids in the active site D. All enzymes have optimum pH
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Proteases are one of the main drug targets. Choose the False statement regarding proteases. A. Proteases are enzymes that cleave peptide bonds. B. Water is a reactant in the reaction catalyzed by proteases. C. Proteases, like all enzymes show substrate specificity, meaning they cleave only substate that fit the bonding product. D. Proteases rely on the proton transfer from NADH to the substrate. E. Protease mechanism involves only acid-base catalysis.
Which of the following is incorrect about the enzyme chymotrypsin? a. It catalyzes the addition of water across a double bond O b. It is known as a serine protease O c. Artificial substrates are used to monitor the reaction catalyzed by the enzyme d. It is classified as a hydrolase
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The role of Zn2+ in catalysis is usually to: a. Stabilize a (-) charge in the transition state Ob. Act as a nucleophile Act as a base Od. Destabilize a (-) charge in the transition state C.