What does the graph tell you about the relationship between Mg2+ concentration and ATP hydrolysis? What is the mechanism that explains the relationship between Mg2+ concentration and ATP hydrolysis?
What does the graph tell you about the relationship between Mg2+ concentration and ATP hydrolysis? What is the mechanism that explains the relationship between Mg2+ concentration and ATP hydrolysis?
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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The graph shows how the free‑energy change for the hydrolysis of ATP varies as a function of Mg2+ concentration. Note that pMg = –log[Mg2+].
What does the graph tell you about the relationship between Mg2+ concentration and ATP hydrolysis?
What is the mechanism that explains the relationship between Mg2+ concentration and ATP hydrolysis?
![The graph shows how the free-energy change for the hydrolysis of ATP varies as a function of Mg²+ concentration. Note that
pMg =- log [Mg²+].
36
8.6
8.4
35
8.2
34
8.0
33
7.8
7.6
7.4
7.2
30
1
2
4
6.
7
pMg
-AG (kJ mol-1)
31
-AG (kcal molF').](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa061449e-1e75-4fa5-9e02-82a00bd019ab%2F632e5169-0ec0-4df3-9cb3-f0bd31c0a2e0%2Fipk91n4_processed.png&w=3840&q=75)
Transcribed Image Text:The graph shows how the free-energy change for the hydrolysis of ATP varies as a function of Mg²+ concentration. Note that
pMg =- log [Mg²+].
36
8.6
8.4
35
8.2
34
8.0
33
7.8
7.6
7.4
7.2
30
1
2
4
6.
7
pMg
-AG (kJ mol-1)
31
-AG (kcal molF').
![What does the graph tell you about the relationship between Mg²+ concentration and ATP hydrolysis?
An increase in [Mg²+] increases the entropy of ATP hydrolysis.
An increase in [Mg²+] increases the phosphoryl-transfer potential of ATP.
A decrease in [Mg²+] increases the free-energy change of ATP hydrolysis.
O A decrease in [Mg²+] increases the rate of ATP hydrolysis.
What is the mechanism that explains the relationship between Mg²+ concentration and ATP hydrolysis?
O increased stabilization due to hydration
electrostatic repulsion is reduced
resonance stabilization is increased
hydrolysis products increase system entropy](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa061449e-1e75-4fa5-9e02-82a00bd019ab%2F632e5169-0ec0-4df3-9cb3-f0bd31c0a2e0%2Fd67k83_processed.png&w=3840&q=75)
Transcribed Image Text:What does the graph tell you about the relationship between Mg²+ concentration and ATP hydrolysis?
An increase in [Mg²+] increases the entropy of ATP hydrolysis.
An increase in [Mg²+] increases the phosphoryl-transfer potential of ATP.
A decrease in [Mg²+] increases the free-energy change of ATP hydrolysis.
O A decrease in [Mg²+] increases the rate of ATP hydrolysis.
What is the mechanism that explains the relationship between Mg²+ concentration and ATP hydrolysis?
O increased stabilization due to hydration
electrostatic repulsion is reduced
resonance stabilization is increased
hydrolysis products increase system entropy
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