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13 Dec 2019

Which is true of viral transformation? A. Transformed cells are abnormal in aooerance and behavior b. All viruses can cause this c. It kills the cell d. It is done only by bacteriophage

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Jarrod Robel
Jarrod RobelLv2
17 Dec 2019
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Related questions

QUESTION 1: The rabies virus primarily affects the nervous system. The specificity that the rabies virus has for neuronal host cells is primarily dictated by __________________________.

A. the helical shape of its viral capsid
B. the type of nucleic acid used for its viral genome (single-stranded, antisense RNA)
C. the spikes that protrude from its viral envelope
D. the segmented nature of its viral genome

QUESTION 2: Which of the following genome types has been observed in viruses? To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.

A. Single-stranded RNA
B. Single-stranded DNA
C. Double-stranded RNA
D. Protein-based

QUESTION 3: Choose the correct statement about viral evolution.

A. RNA and DNA viral genomes evolve at equal rates.
B. Cellular genomes mutate at a faster rate than viral genomes due to their large size and increased chance of replicative mistakes.
C. DNA viruses mutate faster than RNA viruses because thymine is more susceptible to mutation than uracil.

D. RNA viruses mutate faster than DNA viruses due to a lack of proofreading replicative enzymes.

QUESTION 4: Your elderly patient is affected by shingles. After careful observation, you note that the virus responsible for the infection has an icosahedral capsid, is enveloped, and has double-stranded linear DNA as its genetic material. Based on this information, in which of the following viral families would you group this viral pathogen?

A. Hepadnaviridae
B. Parvoviridae
C. Coronaviridae
D. Herpesviridae

QUESTION 5: Which of the following is a key difference between lytic and lysogenic bacteriophage replication cycles?

A. Lysogenic bacteriophages release via host cell lysis, whereas lytic bacteriophages bud off from the host cell membrane.
B. The lytic replication cycle ends with host cell lysis and release of newly formed bacteriophage particles, whereas lysogenic replication leads to prophage formation.
C. Lytic replication requires an uncoating step, whereas in lysogenic replication, the bacteriophage's nucleic acid is directly injected into the host cell.

D. Whereas lytic replication enables the infection of several hosts, lysogenic replication only allows for infection of a single host cell.

QUESTION 6: Which of the following is an unsuitable culture method for an animal virus?

A. Direct inoculation of virus onto blood agar
B. Live animal inoculation
C. Tissue culture method
D. Injection of virus into embryonated eggs

Questions about an immune response to viral infection. When exactly do we make antibodies? Does it occur right after an APC has connected to a CD4+ cell which sends "help" in the form of cytokines to CD8+ cells. CD8+ cells profiliferation process has increased and they fight off a viral infection by causing cell apoptosis. Does it mean that CD4+ cell also sends cytokines and attaches to a B cell which then starts producing plasma cells/ memory cells and antibodies? If that is true, then why do we need antibodies for a viral infection since viruses can't survive without a host cell and these antibodies are just floating around in the blood stream and can't target viruses?

Thanks!

Which of the following states a TRUE principle regarding viral nucleic acid?

The large and complex nature of viral genomes makes whole-genome sequencing approaches difficult
Viruses cannot contain segmented genomes
Viral genome sizes are similar among all viruses that infect humans
In some viruses, mature virions contain both a nucleic acid genome as well as packaged proteins/enzymes

All viruses contain a mixture of RNA and DNA genomes

Electron microscopy is capable of imaging all of the following except:

viruses
Electron microscopy is capable of imaging all of these structures
plant cells
ribosomes

proteins

Virally-infected cells can be directed lysed by interferon (IFN).

True
False

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