Question 23An enzyme has a single active site at which it can bind and hydrolyze either X orY but the enzyme cannot bind X and Y at the same time. Which of the followingstatements are TRUE?Multiple answers: Multiple answers are accepted for this questionSelect one or more answers and submit. For keyboard navigation... SHOW MORE VThe Km for X will be affected if Y is present in the reaction mixture.aY is a competitive inhibitor of X.The Km for X will increase.d.The V for X will be affected if Y is present in the reaction mixture.maxpH dependence of Vmax reflects the ionization state of catalytic siteeresidues.Consider the following: X and Y are methanol (poisonous) and ethanolrespectively. If the Km for X = 0.01 M and the Km for Y = 0.001 M then0.01 M Y is 10 times the concentration of Y required for 0.5 Vmax.Addition of an enzyme to a chemical reaction increases the ratio ofgproducts to reactants (Keg). aThe Km for X will be affected if Y is present in the reaction mixture.Y is a competitive inhibitor of X.The Km for X will increase.d.The Vmaxfor X will be affected if Y is present in the reaction mixture.pH dependence of Vmax reflects the ionization state of catalytic siteeresidues.Consider the following: X and Y are methanol (poisonous) and ethanolrespectively. If the Km for X = 0.01 M and the Km for Y = 0.001 M then0.01 M Y is 10 times the concentration of Y required for 0.5 Vmax.Addition of an enzyme to a chemical reaction increases the ratio ofgproducts to reactants (Keg).A mutation in the active site of an enzyme resulting in a large increase.in stabilization of the ES complex but no change in the stabilization ofthe transition state complex would decrease the rate of productformation because increased stabilization of ES increases theactivation energy although the transition state energy is unchanged.The kcat for a reaction with a Vmax of 0.005 M/sec and [Erotal =i0.000002 M is 0.0000000025/sec

Ans:- The correct options are a, b, c and f. The Km for X will be affected if Y is present in the…

Answered: An enzyme has a single active site at…

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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An enzyme has a single active site at which it can bind and hydrolyze either X or Y but the enzyme cannot bind X and Y at the same time. Which of the following statements are TRUE?