Question 65Below are steps in the evolution/emergence of VCJD.From the choices below, choose the correct sequence of eventsa. BSE prion binds to normal human prion and causes misfoldingb. bone and blood meal contaminated with scrapie prions added to cattle feed, cattle ingestabnormal prionsc. Scrapie prion binds to cattle prions and cause misfolding, BSE emergesd. young people consume beef from BSE cattlee. bodies of Scrapie positive sheep and goats made into high protein blood and bone mealO e, d, c, b, aO e, b, c, d, aO a, b, c, d, eOd, c, b, a, e

vCJD stands for variant Creutzfeldt Jakob Disease. It is also known as human mad cow disease or the…

Answered: Below are steps in the…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Sometimes Ab interferes with the attachment site on virions so they can't attach to a host cell. This process is_________ a. aggregation b. inactivation c. activation
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.
A virus with an envelope is most likely A. an animal virus B. better able to hide from the hosts immune system due to the envelope C. found only in plants D. A and B
A prion is a disease-causing agent composed ofa. cells.b. nucleic acid with a protein coat.c. protein alone.d. nucleic acid alone.
95) The herpesviruses: a. Can have an abortive infection b. Have three round of protein translation in its replication cycles, one before genome replication and two after genome replication c. Can have a persistent infection d. the CD4 is the major receptor
A bacterium has received new DNA that allows it to produce a toxin. Which of the following statements is true? A. There is a change in both the genotype and phenotype. B. There is a change in the genotype, not the phenotype. C. There is a change in the phenotype, not the genotype. D. There is no change in either the genotype or the phenotype.
A particular strain of λ (lambda) can lysogenize its E. coli host at 30°C, but not at 42°C. Could a temperature-sensitive mutation in the int (integrase) gene explain this phenotype? A. There is insufficient information to answer the question. B. No C. Yes
All of the following statements about polioviruses are correct except _____. a. Poliovirus vaccines are produced in both inactivated and live-attenuated forms. b. The oral poliovirus vaccine is composed of three liveattenuated viral strains. c. Poliovirus infects both humans and cattle. d. If genetic reversion of strain 3 occurs when the virus is replicating in vaccinated people, pathogenesis may occur. e. In the United States, the recommended vaccine for poliovirus is the inactivated poliovirus vaccine (IPV).
Leaky scanning allows multiple viral proteins to be synthesized from a single mRNA. A. True B. False
10. All human viruses must have the ability to 1. have only its nucleic acid enter the host cell 2. kill or not kill the host cell 3. multiply in the absence of living cells 4. extracellular uncoat 5. have their nucleic acid replicate in the host cell A. 1,2 B. 2,5 C. 3,4 D. 4,5 E. 1,4 11. Which of the following involves pseudopods? a. adherence of phagocytes to pathogens b. chemotaxis c. opsonization d. extracellular killing e. a & b 12. Antimicrobials may a. produce allergic reactions b. produce toxic effects not only to the microbe but to the host c. kill bacteria in our bodies d. all the above 13. The normal range for IgG is between 700-1600 mg/dL, and the normal range for IgM is between 40 - 250 mg/dL. Your patient has a chronic infection, and you measured his IgG levels to be 500 mg/dL, and his IgM levels to be 40 mg/dl. Based off this information, which of the following caused your patient's low IgG concentration? a. the presence of healthy macrophages b. dysfunctional T helper…
Which of the following is true? a. Viruses have been used to introduce certain genes into humans. b. PCR can be used in tests for inherited diseases c. All the above d. DNA chips can carry sequences from over 1000 gene sequences on one chip.
Which of these is true of prions?a. They are small RNA viruses.b. They replicate in the nucleus.c. They lack protein.d. They cause death of brain cells.

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