Select the graph that correctly illustrates the effect of a negative modifier (effector) on the velocity curve of an allosteric enzyme. Place the correct graph in the set of axes. The solid blue curve represents the unmodified enzyme. The dashed green curve represents the enzyme in the presence of the effector. Reaction velocity Substrate concentration R is the highly active form of the enzyme and T is the less active form of the enzyme. Assume that this is a positively cooperative enzyme, meaning that the affinity for substrate increases with increasing substrate concentration. What would happen to [T]/[R] if substrate concentration is decreased? Answer Bank O [T]/[R] would remain the same. O [T]/[R] would increase. O [T]/[R] would decrease.
Select the graph that correctly illustrates the effect of a negative modifier (effector) on the velocity curve of an allosteric enzyme. Place the correct graph in the set of axes. The solid blue curve represents the unmodified enzyme. The dashed green curve represents the enzyme in the presence of the effector. Reaction velocity Substrate concentration R is the highly active form of the enzyme and T is the less active form of the enzyme. Assume that this is a positively cooperative enzyme, meaning that the affinity for substrate increases with increasing substrate concentration. What would happen to [T]/[R] if substrate concentration is decreased? Answer Bank O [T]/[R] would remain the same. O [T]/[R] would increase. O [T]/[R] would decrease.
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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Q18:
![Select the graph that correctly illustrates the effect of a negative modifier (effector) on the velocity curve of an allosteric enzyme. Place the correct graph in the set of axes. The solid blue curve represents the unmodified enzyme. The dashed green curve represents the enzyme in the presence of the effector.
On the left side, there is a blank graph area labeled with "Reaction velocity" on the y-axis and "Substrate concentration" on the x-axis.
**Answer Bank:**
Four graphs are presented, each depicting an S-shaped curve (sigmoidal curve).
- **Top Left:** Solid blue curve shifts right, above a dashed green curve.
- **Top Right:** Dashed green curve shifts above the solid blue curve.
- **Bottom Left:** Blue and green curves overlap, maintaining the S-shape.
- **Bottom Right:** Solid blue curve is below the dashed green curve.
**Description of Concepts:**
R is the highly active form of the enzyme and T is the less active form of the enzyme. Assume that this is a positively cooperative enzyme, meaning that the affinity for substrate increases with increasing substrate concentration.
**Question:**
What would happen to [T]/[R] if substrate concentration is decreased?
- [ ] [T]/[R] would remain the same.
- [ ] [T]/[R] would increase.
- [ ] [T]/[R] would decrease.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc94cb5d1-997a-49d0-b0ef-9ec02bf0a187%2F3ecca221-22dc-4cd8-9576-9cfdc4de71d3%2Fye1pwx_processed.png&w=3840&q=75)
Transcribed Image Text:Select the graph that correctly illustrates the effect of a negative modifier (effector) on the velocity curve of an allosteric enzyme. Place the correct graph in the set of axes. The solid blue curve represents the unmodified enzyme. The dashed green curve represents the enzyme in the presence of the effector.
On the left side, there is a blank graph area labeled with "Reaction velocity" on the y-axis and "Substrate concentration" on the x-axis.
**Answer Bank:**
Four graphs are presented, each depicting an S-shaped curve (sigmoidal curve).
- **Top Left:** Solid blue curve shifts right, above a dashed green curve.
- **Top Right:** Dashed green curve shifts above the solid blue curve.
- **Bottom Left:** Blue and green curves overlap, maintaining the S-shape.
- **Bottom Right:** Solid blue curve is below the dashed green curve.
**Description of Concepts:**
R is the highly active form of the enzyme and T is the less active form of the enzyme. Assume that this is a positively cooperative enzyme, meaning that the affinity for substrate increases with increasing substrate concentration.
**Question:**
What would happen to [T]/[R] if substrate concentration is decreased?
- [ ] [T]/[R] would remain the same.
- [ ] [T]/[R] would increase.
- [ ] [T]/[R] would decrease.
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