Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 16, Problem 10TYU
EVOLUTION CONNECTION Some bacteria may be able to respond to environmental stress by increasjng the rate at which mutations occur during cell division. How might this be accomplished? Might there be an evolutionary advantage to this ability? Explain.
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Experiment:
In this activity yo Page 5
ze the results of experiments that investigate nutritional requirement of
several mutant strains of yeast. The mutations in these strains cause a nutritional requirement for an
amino acid, such that the strains will not grow in media that lack one specific amino acid. Any mutant
that has a nutritional requirement is called an auxotroph, and is incapable of growing in a "minimal
medium" containing only a carbon source (e.g., glucose), a simple nitrogen source (e.g., ammonium
sulfate), and various salts and minerals. Such strains can be supported on a medium supplemented
with only the missing nutrient or on a "rich" medium that contains amino acids, vitamins, nitrogenous
bases, etc. (often in the form of an extract from yeast). The wild-type individual that can synthesize
the metabolic component is a prototroph, and is capable of growth on minimal medium.
The mutant strains in this activity are unable to synthesize tryptophan, lysine, or histidine;…
You have isolated a strain of mutant yeast cells that divide normally at 25 degrees Celsius but cannot ente4 M phase at 37 degrees Celsius. You found that the gene for M cdk is not mutated. Which of the following temperatures sensitive mutations could be responsible for the.behavior of this strain of yeast? Inactivated of an enzyme that normally degrades m cyclin; Inactivated of a protein that normally triggers the synthesis of m cyclin; Inactivated of a protein kinase that normally Inactivate the cdk; none
2. Which of the following statements about the anaphase promoting complex is false? It promotes the degradation of proteins that activates mitosis; it inhibits m cdk activities; it becomes active at the very beginning of metaphase; it is activated by m cdk
3. During cancer development:.? Cells accumulate mutations in a fixed order which results in increase rate of cell division; the inheritance of mutations caused by dna damage is essential for cancer progression; there is typically…
Anticancer drugs that affect microtubules are often used in cancer treatment. Explain why this is the case and the detailed mechanism(s) of how these drugs inhibit microtubules that make them effective.
Chapter 16 Solutions
Campbell Biology
Ch. 16.1 - Given a polynucleotide sequence such as GAATTC,...Ch. 16.1 - VISUAL SKILLS Griffith was trying to develop a...Ch. 16.2 - What role does complementary base pairing play in...Ch. 16.2 - Identify two major functions of DNA pol III in DNA...Ch. 16.2 - Prob. 3CCCh. 16.2 - Prob. 4CCCh. 16.3 - Describe the structure of a nucleosome, the basic...Ch. 16.3 - Prob. 2CCCh. 16.3 - MAKE CONNECTIONS Interphase chromosomes appear to...Ch. 16 - What does it mean wheti we say that the two DNA...
Ch. 16 - DRAW IT Redraw the Punnett Square on The right...Ch. 16 - Prob. 16.3CRCh. 16 - In his work with pneumonia-causing bacteria and...Ch. 16 - What is the basis for tlie difference in how the...Ch. 16 - In analyzing the number of different bases in a...Ch. 16 - The elongation of the leading Strand during DNA...Ch. 16 - In a nucleosome, the DNA is wrapped around (A)...Ch. 16 - E. coli cells grown on, 15N medium are transferred...Ch. 16 - A biochemist isolates, purifies, and combines in a...Ch. 16 - The spontaneous loss of amino groups from adenine...Ch. 16 - MAKE CONNECTIONS Although the proteins that cause...Ch. 16 - EVOLUTION CONNECTION Some bacteria may be able to...Ch. 16 - SCIENTIFIC INQUIRY DRAW IT Model building can be...Ch. 16 - Prob. 12TYUCh. 16 - Prob. 13TYU
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