Microbiology Fundamentals: A Clinical Approach
3rd Edition
ISBN: 9781259709227
Author: Marjorie Kelly Cowan Professor, Heidi Smith
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 21, Problem 3Q
Many STIs are asymptomatic, or remain latent for long periods of time. What evolutionary advantage do you think that gives them?
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Chapter 21 Solutions
Microbiology Fundamentals: A Clinical Approach
Ch. 21.1 - Prob. 1AYPCh. 21.1 - Prob. 2AYPCh. 21.2 - Prob. 3AYPCh. 21.3 - List the possible causative agents, modes of...Ch. 21.3 - Discuss important features of leptospirosis.Ch. 21.3 - Prob. 1NPCh. 21.3 - Medical Moment Cranberry versus UTI It has long...Ch. 21.4 - List the possible causative agents, modes of...Ch. 21.4 - Prob. 7AYPCh. 21.4 - Prob. 8AYP
Ch. 21.4 - Prob. 9AYPCh. 21.4 - Prob. 10AYPCh. 21.4 - Prob. 11AYPCh. 21.4 - Prob. 12AYPCh. 21.4 - Prob. 2NPCh. 21.4 - Prob. 3NPCh. 21.4 - Prob. 2MMCh. 21 - Prob. 1QCh. 21 - Some of the E. coli strains that are normal biota...Ch. 21 - Many STIs are asymptomatic, or remain latent for...Ch. 21 - Prob. 4QCh. 21 - Three microorganisms in this chapter can be...Ch. 21 - Prob. 6QCh. 21 - Prob. 7QCh. 21 - Prob. 8QCh. 21 - Prob. 9QCh. 21 - Prob. 10QCh. 21 - Prob. 11QCh. 21 - Prob. 12QCh. 21 - Prob. 13QCh. 21 - Prob. 14QCh. 21 - Prob. 15QCh. 21 - Prob. 16QCh. 21 - Prob. 17QCh. 21 - Prob. 18QCh. 21 - Prob. 19QCh. 21 - Prob. 20QCh. 21 - Prob. 21QCh. 21 - Prob. 1VC
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- Retroviruses can cause cancer, along with some viruses with DNA genomes. For example, herpes papillomavirus causes cervical cancer. The HPV genome encodes a protein called E6 that interferes with p53 function, and another protein called E7 that inhibits the function of Rb protein. Explain how HPV causes cancer. Are the viral E6 and E7 protein functions more similar to oncogenes or tumor suppressors?arrow_forwardFigure 10.14 Human papillomavirus can cause cervical cancer. The virus encodes E6, a protein that binds p53. Based on this fact and what you know about p53, what effect do you think E6 binding has on p53 activity? E6 activates p53 E6 inactivates p53 E6 mutates p53 E6 binding marks p53 for degradationarrow_forwardOne of the ways that we know what the RB protein does in cells is that its inactivation is a common priority of tumor-initiating viruses. What advantage would a virus gain by inactivating RB function in its host cell?arrow_forward
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- Why must primary cell cultures be restarted every so often when preparing primary cell cultures to observe morphological changes caused by cells infected by a virus? Why are tumor cells preferred? Why are non-enveloped viruses generally more resistant to disinfectants than are enveloped viruses? A public health physician isolated large number of phages from rivers used as a source of drinking water in western Africa. They physician is very concerned that humans might become ill from drinking this water, although she knows that the phages specifically attack bacteria. Why is she concerned?arrow_forwardStone cells in coconut shells are part of the division of labor in plants. What modifications do they have that make it impossible for them to be dividing and growing cells ?arrow_forwardApproximately how many genes are necessary for amicrobial cell to have a free-living existence?arrow_forward
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