1
Created by Boundless
Which one of the following virus features is NOT used in their classification?
A
type of genetic material in the core
B
presence of an envelope
C
color
D
capsid structure
2
Created by Boundless
What technical development aided in the discovery of viruses?
A
Porcelain filters
B
Electricity
C
Penicillin
D
Light microscope
3
Created by Boundless
Which of the following describes a correct relationship between the major
components of a virus?
A
The envelope encloses the genome of the virus.
B
The capsid encloses the genome of the virus.
C
The capsid encloses the envelope of the virus.
D
4
The genome encloses the capsid of the virus.
Created by Boundless
Which of the following hypotheses proposes that viruses originated from pieces of
more complex organisms?
A
progressive hypothesis
B
alternative hypothesis
C
self-replicating hypothesis
D
regressive hypothesis
5
Created by Boundless
What occurs during the viral replication step of penetration?
A
Viral genetic material is inserted into the host cell.
B
The host cell dies releasing new viruses.
C
Bacteriophages attach themselves to the outside of the
host cell.
D
Viruses leave the host cell by budding off through the cell
membrane.
6
Created by Boundless
Which types of organism can be infected by viruses?
A
Viruses infect only mammals and invertebrates.
B
Viruses infect only organisms with prokaryotic cells.
C
Viruses can infect nearly all types of organisms.
D
Viruses infect only humans.
7
Created by Boundless
What happens to the viral genetic material during the lysogenic cycle of viral
reproduction?
A
The host cell prevents the viral DNA from entering it.
B
The host cell's DNA causes the viral DNA to degrade.
C
Viral DNA is copied and released from the host cell.
D
Viral DNA gets incorporated into the host cell's genome.
8
Created by Boundless
Why do some adults develop shingles after they had chicken pox as a child?
9
A
The virus reactivated after remaining latent for many years.
B
They have become infected with a new form of the virus.
C
Everyone is born with the shingles virus, but only certain
people develop the disease.
D
The chicken pox virus has mutated into a new disease
within their bodies.
Created by Boundless
Why is the tomato spotted wilt virus costly to the economy?
A
Banks will foreclose on farms when crops are infected.
B
The stock market does not trade in crops when they are
infected.
C
People do not invest money with farmers to support future
farming.
D
Infected crops do not make it to market, people do not buy
them, and farmers lose income.
10
Created by Boundless
How does Tamiflu reduce flu symptoms?
A
increases the mutation rate of the virus
B
inhibits an enzyme of the virus
C
all of these answers
D
used in a mixture with other drugs in a drug cocktail
11
Created by Boundless
Highly active anti-retroviral therapy is used to treat which of the following viruses?
A
herpes simplex II
B
Ebola
C
influenza
D
HIV
12
Created by Boundless
How can vaccinations prevent diseases in individuals who do not get vaccinated?
A
Diseases cannot be prevented in those who are not
vaccinated.
B
Resistance to a disease is spread by individuals who are
vaccinated.
C
Vaccines reduce the incidence of a disease in a
community, preventing outbreaks.
D
Killed vaccines cannot cause diseases, even in those who
are not vaccinated.
13
Created by Boundless
What may occur in a population where too few individuals are vaccinated?
A
nothing will happen as only five individuals of every 1000
need to be vaccinated
B
all of these answers
C
the vaccinated individuals will develop back mutations
D
a single infected individual may cause an epidemic
14
Created by Boundless
Through what mechanisms do prions cause disease?
A
infolded neuron cell walls
B
hyper-active immune response
C
abnormally-folded proteins
D
15
changes to DNA
Created by Boundless
Which statement is true of viroids?
A
They produce proteins.
B
They are single-stranded RNA particles.
C
They reproduce only outside of the cell.
D
They produce both plant and animal infections.