1. Determining Km and Vmax. You have recently discovered a new enzyme homeworkase which destroys your homework assignments. In order to characterize this enzyme, you wish to determine the Km and Vmax To do so, you make up several different concentrations of substrate (keeping the enzyme concentration constant) and run the reaction. You obtain the following results. [Substrate] (pages/liter) reaction rate (pages/liter/min) 65 63 51 1.0 x 10³ 5.0 x 104 1.0 x 10-4 5.0 x 105 3.0 x 10-6 2.0 x 105 1.0 x 105 5.0 x 10€ 1.0 x 10€ 5.0 x 10-7 42 33 27 17 9.5 2.2 1.1 (a) Is this data consistent with Michaelis Menten kinetics? (HINT: plot the data). Do not forget to include your well-labeled graph/plot! (b) Determine the Vmax and Km for this enzyme using (i) Lineweaver-Burk and an (ii) Eadie-Hofstee plot (you will have to look up the latter). How do the results compare with each other? Do not forget to include your well-labeled plots!

Chemistry
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ISBN:9781133611097
Author:Steven S. Zumdahl
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Chapter12: Chemical Kinetics
Section: Chapter Questions
Problem 5RQ: Consider the zero-, first-, and second-order integrated rate laws. If you have concentration versus...
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1. Determining Km and Vmax- You have recently discovered a new enzyme homeworkase which destroys
your homework assignments. In order to characterize this enzyme, you wish to determine the Km and Vmax.
To do so, you make up several different concentrations of substrate (keeping the enzyme concentration
constant) and run the reaction. You obtain the following results.
[Substrate] (pages/liter)
reaction rate (pages/liter/min)
65
1.0 x 10-³
5.0 x 10-4
1.0 x 104
5.0 x 10.5
3.0 x 10-5
2.0 x 10-5
1.0 x 10-5
5.0 x 10€
1.0 x 10€
5.0 x 10-7
63
51
42
33
27
17
9.5
2.2
1.1
(a) Is this data consistent with Michaelis Menten kinetics? (HINT: plot the data). Do not forget to include
your well-labeled graph/plot!
(b) Determine the Vmax and Km for this enzyme using (i) Lineweaver-Burk and an (ii) Eadie-Hofstee plot
(you will have to look up the latter). How do the results compare with each other? Do not forget to
include your well-labeled plots!
Transcribed Image Text:1. Determining Km and Vmax- You have recently discovered a new enzyme homeworkase which destroys your homework assignments. In order to characterize this enzyme, you wish to determine the Km and Vmax. To do so, you make up several different concentrations of substrate (keeping the enzyme concentration constant) and run the reaction. You obtain the following results. [Substrate] (pages/liter) reaction rate (pages/liter/min) 65 1.0 x 10-³ 5.0 x 10-4 1.0 x 104 5.0 x 10.5 3.0 x 10-5 2.0 x 10-5 1.0 x 10-5 5.0 x 10€ 1.0 x 10€ 5.0 x 10-7 63 51 42 33 27 17 9.5 2.2 1.1 (a) Is this data consistent with Michaelis Menten kinetics? (HINT: plot the data). Do not forget to include your well-labeled graph/plot! (b) Determine the Vmax and Km for this enzyme using (i) Lineweaver-Burk and an (ii) Eadie-Hofstee plot (you will have to look up the latter). How do the results compare with each other? Do not forget to include your well-labeled plots!
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