BIOLOGY >PRINT UPGRADE<
11th Edition
ISBN: 9780357091586
Author: Solomon
Publisher: CENGAGE L
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Chapter 4.7, Problem 14LO
Compare the roles of the glycocalyx, extracellular matrix, and cell wall.
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. Consider a base substitution mutation that occurred in a DNA sequence that resulted in a change in the
encoded protein from the amino acid glutamic acid to aspartic acid. Normally the glutamic acid amino acid
is located on the outside of the soluble protein but not near an active site.
O-H¨
A. What type of mutation occurred?
O-H
B. What 2 types of chemical bonds are found in the R-groups
of each amino acid? The R groups are shaded.
CH2
CH2
CH2
H2N-C-COOH
H2N-C-COOH
1
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H
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D. Consider the chemical properties of the two amino acids and the location of the amino acid in the
protein. Explain what effect this mutation will have on this protein's function and why.
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 4 Solutions
BIOLOGY >PRINT UPGRADE<
Ch. 4.1 - Prob. 1LOCh. 4.1 - Relate the organizational similarities of all...Ch. 4.1 - Prob. 3LOCh. 4.1 - Prob. 1CCh. 4.1 - PREDICT Could a cell function if it were not...Ch. 4.1 - Prob. 3CCh. 4.1 - What convenient form of chemical energy is used by...Ch. 4.1 - Why is the relationship between surface area and...Ch. 4.2 - Prob. 4LOCh. 4.2 - Prob. 1C
Ch. 4.2 - What are the advantages of using many varied...Ch. 4.3 - Prob. 5LOCh. 4.3 - Prob. 6LOCh. 4.3 - What features do prokaryotic and eukaryotic cells...Ch. 4.3 - Prob. 2CCh. 4.3 - In what ways do membrane-enclosed organelles...Ch. 4.4 - Prob. 7LOCh. 4.4 - Prob. 1CCh. 4.4 - In what ways is transport through the nuclear...Ch. 4.4 - Prob. 3CCh. 4.5 - Distinguish between smooth and rough endoplasmic...Ch. 4.5 - Trace the path of proteins synthesized in the...Ch. 4.5 - Compare the functions of lysosomes, vacuoles, and...Ch. 4.5 - Prob. 11LOCh. 4.5 - Prob. 1CCh. 4.5 - Prob. 2CCh. 4.5 - Prob. 3CCh. 4.5 - Prob. 4CCh. 4.6 - Prob. 12LOCh. 4.6 - Relate the structure of cilia and flagella to...Ch. 4.6 - In what ways do the functions of the cytoskeleton...Ch. 4.6 - How are microfilaments and microtubules similar?...Ch. 4.6 - Prob. 3CCh. 4.7 - Compare the roles of the glycocalyx, extracellular...Ch. 4.7 - Prob. 1CCh. 4.7 - Prob. 2CCh. 4 - Which of the following is the most fundamental...Ch. 4 - Prob. 2TYUCh. 4 - Know and Comprehend 3. Which of the following...Ch. 4 - Which of the following would you expect to find...Ch. 4 - Select the sequence that most accurately describes...Ch. 4 - Prob. 6TYUCh. 4 - Microtubules (a) have constant diameters, but vary...Ch. 4 - All of the following are true of integrins except...Ch. 4 - Prob. 9TYUCh. 4 - Prob. 10TYUCh. 4 - Why does a eukaryotic cell need both membranous...Ch. 4 - INTERPRET data An investigator has isolated two...Ch. 4 - EVOLUTION LINK What types of similarities in cell...Ch. 4 - Prob. 14TYU
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