Which of the following is incorrect?a. The ratio "catalyzed rate/uncatalyzed rate" is known as catalytic powerb. Most enzymes exhibit a higher degree of specificity than non-biologic catalystsO c. Most enzymes are proteins; but a few are RNA moleculesOd. Most enzymes exhibit a higher catalytic power than non-biologic catalysts

Catalysts are compounds that alter the rate of reaction and do not get consumed during the reaction.…

Answered: Which of the following is incorrect? a.…

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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Which of the following is incorrect about an enzyme-catalyzed reaction? a. Its progress can be monitored as the disappearance of substrate Ob. Its progress can be monitored as the formation of product OC. The reaction rate can be expressed as the change in [enzyme] with time d. None; all the other choices are correct
All of the biochemical pathways in a cell constitute O a. coupling reactions O b. metabolism c. exergonic reactions only o d. free energy O e. endergonic reactions only
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Match the letters with the following uncatalyzed products free energy progress of reaction catalyzed reaction activation energy without an enzyme net change in energy between reactants and products reactants activation energy with an energy
3
Which one of the following standard rate constants would have the lowest value and why? O k3 since it is separated by the highest activation energy barrier and limits the overall catalytic rate since it separates E from P O k-1 since it is separated by the highest activation energy barrier and limits the overall catalytic rate through a back reaction O k2 since it is separated by the highest activation energy barrier and limits the overall catalytic rate by producing product k1 since it is separated by the highest activation energy barrier and limits the overall catalytic rate since it forms ES
Which of the following does NOT describe enzyme-catalyzed rate acceleration derived from the binding of substrate to enzyme a. repulsion between like charges b. substrate proximity and orientation c. reduction of entropy (increased order) d. desolvation of the substrate by the enzyme active site e. introduction of strain in bonds that need to break
8.Choose the False statement about enzyme binding sites Binding at an allosteric site ca affect binding and catalysis at the Ortho steric site. In addition to ortho steric sites , some enzymes have other sites where catalysis can be conducted. They are called , allosteric sites, from “allo,” the other. In principle, allosteric ligands can have structures that do not resemble those of substrates. Ligand binding at an allosteric site can cause a conformational change of an enzyme. Enzyme can be inhibited by an allosteric ligand that does not complete with substrate.
What kind of catalysis is cysteine driving in this picture? S Los i fy R……—NHR N-H---S O. N-H H-N H-N. O Metal catalysis Covalent catalysis Base catalysis O Acid catalysis NHR²
Which of the following is incorrect about an enzyme-catalyzed reaction? a. Its progress can be monitored as the disappearance of substrate Ob. Its progress can be monitored as the formation of product OC. The reaction rate can be expressed as the change in [enzyme] with time d. None; all the other choices are correct
Consider the following free energy diagram for an uncatalyzed and enzyme-catalyzed reaction. Select all the statements that are true. Without enzyme With enzyme A+B Time AB Oa. The reaction is now spontaneous due to the addition of enzyme b. The rate of the enzyme catalyzed reaction is faster than the uncatalyzed reaction O C. The reaction is exergonic O d. The change in free energy for the reaction is greater in the catalyzed reaction, compared to the uncatalyzed reaction e. The enzyme stabilizes the transition state for the reaction Released Energy pes
1. Which of the following statements is/are TRUE for both the concerted and sequential models of allosteric enzymes? a. follows the induced-fit model b. the activator can only bind to the R form c. the inhibitor can only bind to the T form d. the substrate can only bind to the R form 2. Which of the following describes the efficiency of enzymatic catalysis? a. [S] b. KM c. Vmax d. kcat

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