Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 19, Problem 4TY
Summary Introduction
Introduction: HIV/AIDS stands for Human Immunodeficiency Virus/Acquired Immunodeficiency syndrome. This is an immunodeficiency disease that is caused by a class of retrovirus (the virus that has RNA genome and converts RNA to DNA). This disease lowers down the immunity of the body by attacking the helper-T cells and makes the individual prone to several infections.
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Students have asked these similar questions
A positive-strand RNA virus:
a.must first be converted to a mRNA before viralproteins can be translated
b.is not recognized by host ribosomes.
c.can directly translate viral proteins.
d.will be degraded by host enzymes.
e.needs RNA dependent RNA polymerase to get converted into mRNA
Which of the following is a commonality between coxsackievirus A16 infection and a varicella zoster infection?Choose one:
A. Both infections are caused by viruses in the herpes family.
B. Each disease is usually mild and self-limiting in children but is more severe in adults.
C. Both viruses can cause a spotted rash to appear on the palms of the hands and soles of the feet.
D. There is a vaccine available for both viruses.
Why are vaccines and/or passive immunization the method of choice in the
treatment or prevention of viral infections?
A. There are no known inhibitors to reverse transcription
B. Viruses are non-living and do not have their own genetic mechanisms to reproduce
by themselves hence host cells must rely on targeting the virus or their products.
C. Antibodies prevent replication of viral genome
D. Antibodies prevent transcription and translation of viral genomes
E. All of these
Chapter 19 Solutions
Biology
Ch. 19.1 - Prob. 1CSCh. 19.2 - Prob. 1CSCh. 19.2 - Viral Reproductive Cycles Concept Check: From the...Ch. 19.4 - Genetic Properties of Bacteria Core Skill:...Ch. 19.4 - Prob. 1CCCh. 19.4 - Genetic Properties of Bacteria Concept Check:...Ch. 19.4 - Prob. 3CCCh. 19.5 - Prob. 1CCCh. 19.5 - Prob. 1EQCh. 19.5 - Prob. 2EQ
Ch. 19.5 - Gene Transfer Between Bacteria CoreSKILL The gene...Ch. 19.5 - Prob. 2CCCh. 19.5 - Gene Transfer Between Bacteria Core Skill:...Ch. 19.5 - Gene Transfer Between Bacteria Concept Check: Is...Ch. 19 - Prob. 1TYCh. 19 - The characteristics of viral genomes show many...Ch. 19 - During viral infection, attachment is usually...Ch. 19 - Prob. 4TYCh. 19 - Prob. 5TYCh. 19 - Prob. 6TYCh. 19 - Prob. 7TYCh. 19 - Prob. 8TYCh. 19 - Prob. 9TYCh. 19 - Prob. 10TYCh. 19 - How are viruses similar to living cells, and how...Ch. 19 - Prob. 2CQCh. 19 - Prob. 3CQCh. 19 - Prob. 1COQCh. 19 - Prob. 2COQ
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- Find the wrong information about virus attachment and absorption to host cell. A. The surface capsid proteins of naked viruses bind to a specific cell receptor on host cell. B. For enveloped viruses, the spikes are responsible for binding to a specific cell receptor. C. A cell lacking a receptor for a specific virus is not infected by that virus. D. Animal viruses, such as HIV are highly specific and they can only infect particular cell types. E. All of these are true.arrow_forwardIdentify the statement that does not provide accurate evidence as to why HIV is so lethal. a. During the course of infection, HIV increases immune activation by altering intestinal physiology to let more microbes into the blood supply. b. Immune evasion increases in many infections due to HIV virions evolving new and unrecognizable epitopes (antigens). c. In many individuals the virus population evolves to use different receptors to gain access to a greater diversity of host immune cells. d. HIV causes enhanced replication and proliferation of T cells, which allows the immune system to work better at defending against pathogens.arrow_forwardWe now have at least three SARS-CoV-2/COVID-19 vaccines approved by the FDA for use in the United States. These vaccines cause cells in the body to make the spike protein that is on the surface of the virus, and subsequently, stimulate an antibody response to this antigen. A. What do these antibodies do to prevent infection by SARS-CoV-2? How do they interact with the virus particles? B. Which kind of cells in the immune system are responsible for synthesizing these antibodies?arrow_forward
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