4. The following rate constants have been determined for a Michaelis –Menen enzyme: ki = 2.5 x 10$ M' s', k.1 =2 x 10³ s', and k2= 5 x 10ª s'. a. Calculate Ks and Km for this enzyme. b. Does the substrate binding approach equilibrium or the steady state? Explain why.

Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter21: Biochemistry
Section: Chapter Questions
Problem 28QAP: . Describe the lock-and-key model for enzymes. Why are the shapes of the enzyme and its substrate...
icon
Related questions
icon
Concept explainers
Question

R5

4. The following rate constants have been determined for a Michaelis -Mena enzyme: kı = 2.5 x
10$ M' s', k.1 = 2 x 103 s!, and k2= 5 x 10* s'.
%3D
a. Calculate K, and Km for this enzyme.
b. Does the substrate binding approach equilibrium or the steady state? Explain why.
c. In a 500ul reaction containing 2pmol of the enzyme and saturating levels of substrate.
What is the Vmax for the enzyme? Assume two active sites per enzyme molecule.
d. What substrate concentration would be needed for the reaction in 4c to achieve half
maximal velocity? Justify your answer mathematically.
e. What is the efficiency of this enzyme? Would this enzyme be considered a perfect
enzyme? Explain.
Transcribed Image Text:4. The following rate constants have been determined for a Michaelis -Mena enzyme: kı = 2.5 x 10$ M' s', k.1 = 2 x 103 s!, and k2= 5 x 10* s'. %3D a. Calculate K, and Km for this enzyme. b. Does the substrate binding approach equilibrium or the steady state? Explain why. c. In a 500ul reaction containing 2pmol of the enzyme and saturating levels of substrate. What is the Vmax for the enzyme? Assume two active sites per enzyme molecule. d. What substrate concentration would be needed for the reaction in 4c to achieve half maximal velocity? Justify your answer mathematically. e. What is the efficiency of this enzyme? Would this enzyme be considered a perfect enzyme? Explain.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Catalysis and Enzymatic Reactions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
Chemistry
ISBN:
9781337399425
Author:
Steven S. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Principles of Modern Chemistry
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
Chemistry
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781133611097
Author:
Steven S. Zumdahl
Publisher:
Cengage Learning