FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
5th Edition
ISBN: 9781119750192
Author: Voet
Publisher: WILEY
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Chapter 21, Problem 24E
Summary Introduction
To explain: The reason behind inhibitors of the enzyme monoamine oxidase (MAO) is used as drugs to treat mood disorders.
Concept introduction:
A group of enzymes present in the outer membrane of mitochondria functions to catalyze the oxidation of monoamines. These enzymes are collectively known as monoamine oxidase (MAO). The monoamine oxidase inhibitors block or inhibit the actions of the monoamine oxidase enzymes.
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Students have asked these similar questions
1. (10 points) Pulverized coal pellets, which may be
°
approximated as carbon spheres of radius r = 1 mm, are
burned in a pure oxygen atmosphere at 1450 K and 1 atm.
Oxygen is transferred to the particle surface by diffusion, where
it is consumed in the reaction C + O₂ →> CO₂. The reaction rate
is first order and of the form No2 = k₁C₁₂(r), where k₁ = 0.1 m/s.
Neglecting changes in r, determine the steady-state O₂ molar
consumption rate in kmol/s. At 1450 K, the binary diffusion
coefficient for O2 and CO2 is 1.71 x 10ª m²/s.
2. (20 points) Consider combustion of hydrogen gas in a mixture
of hydrogen and oxygen adjacent to the metal wall of a
combustion chamber. Combustion occurs at constant
temperature and pressure according to the chemical reaction
2H₂+ O₂→ 2H₂O. Measurements under steady-state conditions
at 10 mm from the wall indicate that the molar concentrations
of hydrogen, oxygen, and water vapor are 0.10, 0.10, and 0.20
kmol/m³, respectively. The generation rate of water vapor is
0.96x102 kmol/m³s throughout the region of interest. The binary
diffusion coefficient for each of the species (H, O̟, and H₂O) in
the remaining species is 0.6 X 10-5 m²/s.
(a) Determine an expression for and make a qualitative plot
of C as a function of distance from the wall.
H2
(b) Determine the value of C2 at the wall.
H2
(c) On the same coordinates used in part (a), sketch curves
for the concentrations of oxygen and water vapor. This will
require you to calculate Co, and C.
02
H20
(d) What is the molar flux of water…
4. (15 points) Consider a spherical organism of radius ro within
which respiration occurs at a uniform volumetric rate of That is,
oxygen (species A) consumption is governed by a first- order
reaction, homogeneous chemical reaction.
a. If a molar concentration of CA(ro) = CA,o is maintained at
the surface of the organism, obtain an expression for the
radial distribution of oxygen, CA(r), within the organism.
Hint: To simplify solution of the species diffusion equation,
invoke the transformation y = rCA.
b. Obtain an expression for the rate of oxygen consumption
within the organism.
c. Consider an organism of radius ro = 0.10 mm and a
diffusion coefficient of DAB = 108 m2/s. If CA, o = 5 x105
kmol/m3 and k1 20 s1, estimate the corresponding value
of the molar concentration at the center of the organism.
What is the rate of oxygen consumption by the organism?
Chapter 21 Solutions
FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
Ch. 21 - Prob. 1ECh. 21 - 2. The compound shown below inhibits an...Ch. 21 - Prob. 3ECh. 21 - Prob. 4ECh. 21 - 5. Explain why it was advantageous for human...Ch. 21 - Prob. 6ECh. 21 - 7. Which of the 20 “standard” amino acids are (a)...Ch. 21 - 8. Alanine, cysteine, glycine, serine, and...Ch. 21 - Prob. 9ECh. 21 - 10. Draw the amino acid-Schiff base that forms in...
Ch. 21 - Prob. 11ECh. 21 - Prob. 12ECh. 21 - 13. Which three mammalian enzymes can potentially...Ch. 21 - Prob. 14ECh. 21 - Prob. 15ECh. 21 - Prob. 16ECh. 21 - Prob. 17ECh. 21 - Prob. 18ECh. 21 - Prob. 19ECh. 21 - 20. From what amino acid is the signaling molecule...Ch. 21 - Prob. 21ECh. 21 - Prob. 22ECh. 21 - 23. Describe the reactions that convert...Ch. 21 - Prob. 24ECh. 21 - 25. One of the symptoms of kwashiorkor, the...Ch. 21 - 26. From what amino acid is melatonin derived?...Ch. 21 - Prob. 27ECh. 21 - 28. Nitrosomonas is a photophobic (light-avoiding)...Ch. 21 - Prob. 29CQCh. 21 - Prob. 30CQCh. 21 - 31. (a) How many ATP equivalents are consumed by...Ch. 21 - Prob. 32CQCh. 21 - Prob. 33CQCh. 21 - Prob. 34CQCh. 21 - Prob. 35CQCh. 21 - Prob. 36CQCh. 21 - 37. The nucleotide deoxyuridylate (dUMP) is...Ch. 21 - 38. Proliferating cells require NADPH for...Ch. 21 - 39. Mouse embryonic stem cells produce high levels...Ch. 21 - 40. Rice plants that have been engineered to...Ch. 21 - Prob. 41CQCh. 21 - Prob. 1MTE
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