Standard redox potentials E' for some common compounds in biochemistry: Eo' (Volt) + 0,81 12 O2 + 2 H+ + 2 e NO3 + 2 H+ + 2 e 2 cyt c (ox) + 2 e 2 cyt b (ox) + 2 e Pyruvate + 2 H+ + 2 e NAD + 2 H+ + 2 e Acétoacétate + 2 H+ + 2 e (2) acétoacétate + NADH+H* H₂O NO₂ + H₂O 2 cyt c (red) 2 cyt b (red) Lactate (3) 2 cyt c (ox) + 2 cyt b (red) NADH + H* B-hydroxybutyrate +0,42 + 0,25 + 0,08 - 0,19 -0,32 With the help of the above table, determine the spontaneous direction of the following reactions in the standard conditions. Justify your answers by calculating the Gibbs (free) energy of reaction in each case. (1) pyruvate + B-hydroxybutyrate - 0,35 lactate + acétoacétate B-hydroxybutyrate + NAD+ 2 cyt c (red) + 2 cyt b (ox)

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
icon
Related questions
Question
Standard redox potentials Eo' for some common compounds in biochemistry:
Eo' (Volt)
+ 0,81
+0,42
+ 0,25
12 O₂ + 2 H+ + 2 e
NO3 + 2 H+ + 2 e
2 cyt c (ox) + 2 e
2 cyt b (ox) + 2 e
Pyruvate + 2 H+ + 2 e*
NAD + 2 H+ + 2 e
Acétoacétate + 2 H+ + 2 e
(2) acétoacétate + NADH + H+
H₂O
NO₂ + H₂O
2 cyt c (red)
2 cyt b (red)
Lactate
(3) 2 cyt c (ox) + 2 cyt b (red)
NADH + H+
B-hydroxybutyrate
+ 0,08
- 0,19
With the help of the above table, determine the spontaneous direction of the following
reactions in the standard conditions. Justify your answers by calculating the Gibbs
(free) energy of reaction in each case.
(1) pyruvate + ß-hydroxybutyrate
-0,32
- 0,35
lactate + acétoacétate
B-hydroxybutyrate + NAD+
2 cyt c (red) + 2 cyt b (ox)
Transcribed Image Text:Standard redox potentials Eo' for some common compounds in biochemistry: Eo' (Volt) + 0,81 +0,42 + 0,25 12 O₂ + 2 H+ + 2 e NO3 + 2 H+ + 2 e 2 cyt c (ox) + 2 e 2 cyt b (ox) + 2 e Pyruvate + 2 H+ + 2 e* NAD + 2 H+ + 2 e Acétoacétate + 2 H+ + 2 e (2) acétoacétate + NADH + H+ H₂O NO₂ + H₂O 2 cyt c (red) 2 cyt b (red) Lactate (3) 2 cyt c (ox) + 2 cyt b (red) NADH + H+ B-hydroxybutyrate + 0,08 - 0,19 With the help of the above table, determine the spontaneous direction of the following reactions in the standard conditions. Justify your answers by calculating the Gibbs (free) energy of reaction in each case. (1) pyruvate + ß-hydroxybutyrate -0,32 - 0,35 lactate + acétoacétate B-hydroxybutyrate + NAD+ 2 cyt c (red) + 2 cyt b (ox)
Expert Solution
steps

Step by step

Solved in 4 steps with 3 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781319114671
Author:
Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:
W. H. Freeman
Lehninger Principles of Biochemistry
Lehninger Principles of Biochemistry
Biochemistry
ISBN:
9781464126116
Author:
David L. Nelson, Michael M. Cox
Publisher:
W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul…
Fundamentals of Biochemistry: Life at the Molecul…
Biochemistry
ISBN:
9781118918401
Author:
Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:
WILEY
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305961135
Author:
Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher:
Cengage Learning
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305577206
Author:
Reginald H. Garrett, Charles M. Grisham
Publisher:
Cengage Learning
Fundamentals of General, Organic, and Biological …
Fundamentals of General, Organic, and Biological …
Biochemistry
ISBN:
9780134015187
Author:
John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher:
PEARSON