FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
5th Edition
ISBN: 9781119750192
Author: Voet
Publisher: WILEY
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Chapter 22, Problem 25E
Summary Introduction
To explain: The way in which the regulatory mechanism of 3-phosphoglycerate helps to control the growth of cancer cells.
Concept introduction: 3-phosphoglycerate is an important
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6. Which one is the major organic product
obtained from the following reaction?
CO₂Me
1. LiAlH4
2. H₂O
CH₂OH
CH₂OCH3
5555
HO
A
B
HO
C
HO
D
CH₂OH
E
?
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…
Chapter 22 Solutions
FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
Ch. 22 - Prob. 1ECh. 22 - Prob. 2ECh. 22 - 3. Toxins that occur in certain mushrooms block ?...Ch. 22 - Prob. 4ECh. 22 - 5. The passive glucose transporter named GLUT1...Ch. 22 - Prob. 6ECh. 22 - Prob. 7ECh. 22 - 8. (a) Identify the two reactions that allow the...Ch. 22 - Prob. 9ECh. 22 - Prob. 10E
Ch. 22 - Prob. 11ECh. 22 - 12. Predict the effect of an overdose of insulin...Ch. 22 - 13. Would you expect insulin to increase or...Ch. 22 - Prob. 14ECh. 22 - 15. Why can adipose tissue be considered to be an...Ch. 22 - 16. If the circulatory system of an ob/ob mouse is...Ch. 22 - 17. In experiments to test the...Ch. 22 - Prob. 18ECh. 22 - Prob. 19ECh. 22 - Prob. 20ECh. 22 - Prob. 22ECh. 22 - Prob. 21ECh. 22 - 23. AMPK activates phosphofructokinase-2. Explain...Ch. 22 - Prob. 24ECh. 22 - Prob. 25ECh. 22 - Prob. 26ECh. 22 - 27. Why does oxidative metabolism, which generates...Ch. 22 - Prob. 28CQCh. 22 - 29. Pancreatic ? cells express a receptor for...Ch. 22 - Prob. 30CQCh. 22 - Prob. 31CQCh. 22 - Prob. 32CQCh. 22 - 33. Experienced runners know that it is poor...Ch. 22 - 34. After several days of starvation, the capacity...Ch. 22 - Prob. 35CQCh. 22 - Prob. 36CQCh. 22 - Prob. 37CQCh. 22 - Prob. 38CQCh. 22 - Prob. 39CQCh. 22 - Prob. 40CQCh. 22 - Prob. 1MTE
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- 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?arrow_forward3. (15 points) Living cells homogeneously distributed (immobilized) with an agarose gel require glucose to survive. An important aspect of the biochemical system design is the effective diffusion coefficient of glucose (A) into the cell- immobilized gel. Consider the experiment shows below where a slab of the cell-immobilized gel of 1.0cm thickness is placed within a well-mixed aqueous solution of glucose maintained at a concentration of 50 mmol/L. The glucose consumption within the cell-immobilized gel proceeds by a zero-order process given by R₁ = -0.05 mmol/(L min). The solubilities of glucose in both the water and the gel are the same; that is, the concentration of the glucose on the water side of the water-gel interface is equal to the concentration of the glucose on the gel side of the water gel interface. A syringe is mounted at the center of the gel carefully excises a tiny sample of the gel for glucose analysis. A Well mixed solution Constant concentration 50nmol/L Living…arrow_forwardTwo tetrapeptides were isolated from a possum's sweat glands. These peptides were sequenced using Edman degradation and the following 2 sequences were obtained: Gly-Asp-Ala-Leu Gly-Asp-Asp-Leu Can you please help show the titration curve for both of these peptides and calculate the PI?arrow_forward
- Two tetrapeptides were isolated from a possum's sweat glands. These peptides were sequenced using Edman degradation and the following 2 sequences were obtained: Gly-Asp-Ala-Leu Gly-Asp-Asp-Leu What is the structure of the PTH derivative produced during the last round of amino acid sequencing?arrow_forwardWhat is the primary sequence of this undecapeptide? Also, if x-ray crystallography shows a highly stable hairpin turn within the polypeptide, what about the primary sequence explains this structural feature?arrow_forwardDraw the product of this reaction. Ignore inorganic byproducts. H H ⚫OH HO- -H H- -OH H- -OH CH2OH Ag*, NH4OH, H2O Draw Fischer Projectionarrow_forward
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