Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Chapter 14, Problem 3P
Freshly prepared mitochondria were incubated with ß-hydroxybutyrate, oxidized cytochrome c, ADP, Pi, and cyanide. ß-hydroxybutyrate is oxidized by an NAD+ -dependent dehydrogenase. 
- The experimenter measured the rate of oxidation of ß-hydroxybutyrate and the rate of formation of ATP.
- Indicate the probable flow of electrons in this system.
- How many moles of ATP would you expect to be formed per mole of ß-hydroxybutyrate oxidized in this system?
- Why is ß-hydroxybutyrate added rather than NADH?
- What is the function of the cyanide?
- Write a balanced equation for the overall reaction occurring in this system (electron transport and ATP synthesis).
- Calculate the net standard free energy change (ΔGO') in this system, using
E'o values from Table 14.1 and a ΔGO' value for ATP hydrolysis of -32.2 kJ / mol.
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Solution
? Hint
Sub
bo Each pictured Lewis structure is invalid. Identify the error in each case.
O Macmillan Learning
:0▬▬0:
Answer Bank
wrong electron total
:0-
:F======F:
octet-rule violation
N
:0:
[s] mM
V (M/s)
Uninhibited
0.333
1.65 x 107
1.05 x 107
V (M/s) x 10'
Inhibitor A
V (M/s) x 107
Inhibitor B
0.794 x 107
0.40
1.86 x 107
1.21 x 107
0.893 x 107
0.50
2.13 x 107
1.43 x 107
1.02 x 107
0.666
2.49 x 107
1.74 x 107
1.19 x 107
1.0
2.99 x 107
2.22 x 107
1.43 x 107
2.0
3.72 x 107
3.08 x 107
1.79 x 107
For a Michaelis-Menten reaction, k₁-5 x 10'/M-s, k.-2 x 10%/s, and k₂-4 x 10²/s.
a)
Calculate the Ks and KM for this reaction.
b)
Does substrate binding achieve equilibrium or steady state?
Chapter 14 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
Ch. 14 - Prob. 1PCh. 14 - When pure reduced cytochrome c is added to...Ch. 14 - Freshly prepared mitochondria were incubated with...Ch. 14 - Prob. 4PCh. 14 - Prob. 5PCh. 14 - Prob. 6PCh. 14 - Intramitochondrial ATP concentrations are about 5...Ch. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Years ago there was interest in using uncouplers...
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