Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 13, Problem 12RQ
Which polysaccharide is usually found in the cell walls of
a. starch
b. glycogen
c. chitin
d. cellulose
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. Consider a base substitution mutation that occurred in a DNA sequence that resulted in a change in the
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engineered constructs that consist of hollow fibers are acting as synthetic capillaries, around which cells have been loaded. The cellular space around a single fiber can be modeled as if it were a Krogh tissue cylinder. Each fiber has an outside “capillary” radius of 100 µm and the “tissue” radius can be taken as 200 µm. The following values apply to the device:R0 = 20 µM/secaO2 = 1.35 µM/mmHgDO2,T = 1.67 x 10-5 cm2/secPO2,m = 4 x 10-3 cm/secInstead of blood inside the fibers, the oxygen transport and tissue consumption are being investigated by usingan aqueous solution saturated with pure oxygen. As a result, there is no mass transfer resistance in the synthetic“capillary”, only that due to the membrane itself. Rather than accounting for pO2 variations along the length ofthe fiber, use an average value in the “capillary” of 130 mmHg.Is the tissue fully oxygenated?
Molecular Biology
Please help with question. thank you
You are studying the expression of the lac operon. You have isolated mutants as described below. In the presence of glucose, explain/describe what would happen, for each mutant, to the expression of the lac operon when you add lactose AND what would happen when the bacteria has used up all of the lactose (if the mutant is able to use lactose).5. Mutations in the lac operator that strengthen the binding of the lac repressor 200 fold
6. Mutations in the promoter that prevent binding of RNA polymerase
7. Mutations in CRP/CAP protein that prevent binding of cAMP8. Mutations in sigma factor that prevent binding of sigma to core RNA polymerase
Chapter 13 Solutions
Concepts of Biology
Ch. 13 - Figure 13.6 Which of the following statements is...Ch. 13 - The first forms of life on Earth were thought to...Ch. 13 - The first organisms that oxygenated the atmosphere...Ch. 13 - Which of the following consist of prokaryotic...Ch. 13 - Prokaryotes stain as Gram-positive or...Ch. 13 - Prokaryotes that obtain their energy from chemical...Ch. 13 - Bioremediation includes _____. a. the use of...Ch. 13 - What event is thought to have contributed to the...Ch. 13 - Mitochondria most likely evolved from_______. a. a...Ch. 13 - Protists with the capabilities to absorb nutrients...
Ch. 13 - Which parasitic protist evades the host immune...Ch. 13 - Which polysaccharide is usually found in the cell...Ch. 13 - What term describes the close association of a...Ch. 13 - Explain the reason why the imprudent and excessive...Ch. 13 - Your friend believes that prokaryotes are always...Ch. 13 - Describe the hypothesized steps in the origin of...Ch. 13 - How does killing Anopheles mosquitoes affect the...Ch. 13 - Without treatment, why does African sleeping...Ch. 13 - Why can superficial mycoses in humans lead to...
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