WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 15, Problem 10MC
Summary Introduction
Introduction:
The word AIDS stands for Acquired Immunodeficiency Syndrome. It is a disease caused by Human Immunodeficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome.
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Which of the following virus does not use CXCR4 as a receptor?
a. HIV-2
b. SIV
c. poliovirus
d. HIV-1
Identify 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.
Read the article and then answers the following question.3. Why is it difficult to create a vaccine for AIDS? a. the virus is too well hidden in the body b. the virus is constantly changing c. vaccines only work on bacterial infections d. not enough research money 4. Years ago, doctors would prescribe antibiotics for many symptoms of a common cold. Today, it is much more difficult to get a prescription. Why has the medical industry changed its procedures? a. too many antibiotics can create resistant bacteria b. pharmaceutical companies objected to the amount of prescriptions c. antibiotics can make people sick d. doctors are against prescribing medicines 5. To see evolution in action, you should look at organisms with: a. short lifespans b. complex body systems c. large populations d. short amount of time between generations
Chapter 15 Solutions
WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
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- HIV virus is classified as double¬ stranded RNA (ds-RNA) virus and belongs to a group of viruses called reoviridae? a. FALSE. b. TRUE.arrow_forwardThe --------------- retrovirus contains a ______________ genome: Select one: a. chicken pox, circular DNA b. Sars CoVII, double-stranded RNA c. measles, double-stranded DNA d. HIV, Single-stranded RNAarrow_forwardWhich 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.arrow_forward
- We are confronted with a new RNA virus that uses x-proteins to attach to host cells and primarily infects liver cells. Based on this we would expect: (2 answers only) a. possible latent infections b. viral susceptibility to valacyclovir c. viral suspeptibility to RNA->RNA pol inhibitor d. symptoms of hepatitsarrow_forwardWhich among the following is caused by a non enveloped viruses? a. Chicken pox b. mumps c. Influenza d. polioarrow_forwardWhich of the following is a trait that both HPV and HIV share? A.Both have an RNA genome B.Both undergo reverse transcription C.Both integrate into the genome D.Both can cause cancerarrow_forward
- Prior to entry, the _________ glycoprotein of the HIV virus recognizes the ______ receptor on the surface of the macrophage. a. CCR5; gp120 b. CXCR4; CCR5 c. CD4; CCR5 d. gp120; CD4arrow_forwardViruses in the Herpesviridae family are double-stranded DNA enveloped viruses. Specifically the virus Varicella can cause chickenpox, which when in adults is called ___________. This can exist as a ____________ in the DNA of host cells. Select one: a.herpes/ Provirus b.measles/ Provirus c.Shingles / Prophage d.None of the Above e.Shingles / Provirusarrow_forwardA researcher, studying two different animal viruses (A and B) that infect the same cell type, digests away all the protein and transfers the nucleic acid directly into the host cell. Only virus B causes the infection. This suggests: a. Virus A is likely to be a naked virus. b. Virus A is likely to be an enveloped virus. c. Virus A is likely to be a -ssRNA virus. d. Virus A is likely to be a +ssRNA virus. e. Virus A is likely to be a dsDNA virus. And now explain why.arrow_forward
- Symptoms of viral infections are caused by: (choose all that apply) A. Actions of the virus that result in cell damage or death B. Actions of the immune system that result in cell damage or death C. Changes in a cell's genetics that result in cancerarrow_forwardA virus is isolated, and individual virions appear spherical. What type of virus is this? A. Bacteriophage B. Helical C. Icosahedral D. Lysogenicarrow_forwardRead the article then answer the following questions. 3. Why is it difficult to create a vaccine for AIDS? a. the virus is too well hidden in the body b. the virus is constantly changing c. vaccines only work on bacterial infections d. not enough research money 4. Years ago, doctors would prescribe antibiotics for many symptoms of a common cold. Today, it is much more difficult to get a prescription. Why has the medical industry changed its procedures? a. too many antibiotics can create resistant bacteria b. pharmaceutical companies objected to the amount of prescriptions c. antibiotics can make people sick d. doctors are against prescribing medicines 5. To see evolution in action, you should look at organisms with: a. short lifespans b. complex body systems c. large populations d. short amount of time between generationsarrow_forward
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