Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 13, Problem 15RE
RECALL What vectors can be used for cloning?
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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 13 Solutions
Biochemistry
Ch. 13 - RECALL What advantages does fluorescent labeling...Ch. 13 - RECALL What methods are used to visualize...Ch. 13 - REFLECT AND APPLY When proteins are separated...Ch. 13 - RECALL How does the use of restriction...Ch. 13 - RECALL What is the importance of methylation in...Ch. 13 - RECALL Why do restriction endonucleases not...Ch. 13 - Prob. 7RECh. 13 - Prob. 8RECh. 13 - RECALL What do the following have in common? MOM;...Ch. 13 - RECALL Give three examples of DNA palindromes.
Ch. 13 - RECALL What are three differences between the...Ch. 13 - RECALL What are sticky ends? What is their...Ch. 13 - RECALL What would be an advantage of using HaeIII...Ch. 13 - RECALL Describe the cloning of DNA.Ch. 13 - RECALL What vectors can be used for cloning?Ch. 13 - RECALL Describe the method you would use to test...Ch. 13 - RECALL What is blue/white screening? What is the...Ch. 13 - Prob. 18RECh. 13 - Prob. 19RECh. 13 - Prob. 20RECh. 13 - Prob. 21RECh. 13 - Prob. 22RECh. 13 - Prob. 23RECh. 13 - REFLECT AND APPLY What are the requirements for an...Ch. 13 - Prob. 25RECh. 13 - Prob. 26RECh. 13 - REFLECT AND APPLY The genes for both the a- and...Ch. 13 - REFLECT AND APPLY Outline the methods you would...Ch. 13 - Prob. 29RECh. 13 - Prob. 30RECh. 13 - Prob. 31RECh. 13 - Prob. 32RECh. 13 - RECALL Why is temperature control so important in...Ch. 13 - RECALL Why is the use of temperature-stable DNA...Ch. 13 - RECALL What are the criteria for good primers in a...Ch. 13 - REFLECT AND APPLY What difficulties arise in the...Ch. 13 - REFLECT AND APPLY Each of the following pairs of...Ch. 13 - RECALL What is qPCR?Ch. 13 - Prob. 39RECh. 13 - REFLECT AND APPLY Suppose that you are a...Ch. 13 - REFLECT AND APPLY Why is DNA evidence more useful...Ch. 13 - REFLECT AND APPLY Give the DNA sequence for the...Ch. 13 - Prob. 43RECh. 13 - Prob. 44RECh. 13 - Prob. 45RECh. 13 - Prob. 46RECh. 13 - Prob. 47RECh. 13 - RECALL Has proteomic analysis been done on...Ch. 13 - Prob. 49RECh. 13 - Prob. 50RECh. 13 - Prob. 51RECh. 13 - RECALL What are the key differences between DNA...
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- 3. (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_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 What is the structure of the PTH derivative produced during the last round of amino acid sequencing?arrow_forward
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