unit 1 microbiology
A.
In the lysogenic cycle of bacteriophages, the integrated phage genome is known as which of the following? A. prophage B. provirus C. virioid D. virion
A.
Reverse transcriptase is used to generate which nucleic acid from RNA? A. cDNA B. dsRNA C. (+)ssRNA D. (?)ssRNA
C.
Which of the following is a novel enzyme found in retroviruses? A. forward transcriptase B. retrotranscriptase C. reverse transcriptase D. Taq polymerase
C.
Which mechanism of horizontal gene transfer relies on the use of viruses? A. conjugation B. mutation C. transduction D. transformation
A.
The excision of the viral genome from the host chromosome is known as which of the following? A. induction B. lysogeny C. phage conversion D. transduction
C.
An acellular entity composed of a small circular RNA molecule without a capsid and capable of replicating its genome is known as which of the following? A. satellite RNA B. virion C. viroid D. virusoid
D.
An acellular entity composed of a small circular RNA molecule without a capsid and is not capable of replicating its genome is known as which of the following? A. provirus B. virion C. viroid D. virusoid
B.
The protein subunits that surround the nucleic acid of a virus are known as which of the following? A. amino acids B. capsomeres C. chromatins D. telomeres
C.
Transmissible spongiform encephalopathies, such as Creutzfeldt-Jakob disease, are caused by which of the following? A. bacterium B. fungus C. prion D. virus
A.
You are a nurse and you suspect that you may have been exposed to a particular virus. You and your health care provider decide to perform a hemagglutinin assay. A sample of your serum is taken and added to a sample of virus. Next, the virus and serum sample are added to erythrocytes. Upon examination, you do not see any agglutination occurring. Which can you conclude from these results? A. The test result suggests you may have been exposed to the virus, and your serum contains antibodies against the virus. B. The test result suggests you may have been exposed to the virus, but your serum does not contain antibodies against the virus. C. The test result suggests you may not have been exposed to the virus. D. You cannot make a conclusion from the information given
