Exam (elaborations)
BIOL 1404 |UPDATED ACTUAL VERIFIED EXAM WITH ALL NEW UPDATED QUESTIONS
- Course
- BIOL MISC
- Institution
- Texas Tech University
BIOL 1404 |UPDATED ACTUAL VERIFIED EXAM WITH ALL NEW UPDATED QUESTIONS
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BIOL 1404 |UPDATED ACTUAL VERIFIED EXAM WITHALL NEW UPDATED QUESTIONS
1. Which of the following events or characteristics accounts for someone who has had regular
herpesvirus-mediated cold sores or genital sore flare-ups?
a. reinfection by a closely related herpesvirus of a different strain
b. reinfection by the same herpesvirus strain
c. copies of the herpesvirus genome are permanently maintained in host nuclei
d. copies of the herpesvirus genome are permanently maintained in host cell cytoplasm
2. HIV is inactivated in the laboratory after a few minutes of sitting at room temperature, but the
flu virus is still active after sitting for several hours. What are the practical consequences of these
findings?
a. HIV can be transmitted more easily from person to person than the flu virus.
b. The flu virus can be transmitted more easily from person to person than HIV.
c. This property of HIV makes it more likely to be a pandemic than the flu virus.
d. Disinfecting surfaces are more important to reduce the spread of HIV than of the flu.
3. A bacterium is infected with an experimentally constructed bacteriophage composed of the T2
phage protein coat and T4 phage DNA. The new phages produced would have .
a. T2 protein and T4 DNA
b. T2 protein and T2 DNA
c. T4 protein and T4 DNA
d. T4 protein and T2 DNA
4. RNA viruses require their own supply of certain enzymes because .
a. host cells rapidly destroy the viruses
b. these enzymes translate viral mRNA into proteins
c. these enzymes penetrate host-cell membranes
d. host cells lack enzymes that can replicate the viral genome
e. these enzymes cannot be made in host cells
, 5. Cells were infected
with approximately 1000 copies of either virus A or virus B at the 0 time point. At 5-minute
intervals, a sample of the virus and cell mixture was removed. The intact cells were removed
from the sample, and the number of viruses per milliliter of culture was determined.
Using the data in the figure above, how long does it take for virus B to go through one lytic
cycle?
a. 15 minutes
b. 30 minutes
c. 45 minutes
d. 60 minutes
e. 90 minutes
6. What would the result be if a drug that blocks the action of RNA polymerase was introduced into
a virus-infected organism?
a. The viral proteins would not be made, and the virus would not be able to reproduce.
b. The virus would not be able to enter new host cells.
c. The newly formed virions (virus particles) would be unable to leave the host cell.
d. Viral proteins and viral DNA particles would not be able to assemble.
7. Which viruses have single-stranded RNA that acts as a template for DNA synthesis?
a. Bacteriophages
b. (+) ssRNA viruses
c. Proviruses
d. dsRNA viruses
e. retroviruses
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