Ch. 6 Microbio

The excision of the viral genome from the host chromosome is known as which of the following?

induction

Which effect does tomato planta macho viroids have on the crop?

loss of chloryphyll

Which unit of length best describes the average size of a virion?

nm

Transmissible spongiform encephalopathies, such as Creutzfeldt-Jakob disease, are caused by which of the following?

prion

In the lysogenic cycle of bacteriophages, the integrated phage genome is known as which of the following?

prophage

Although there are no current treatments for prion infections, which of the following could be used?

proteases

In retroviruses, the integrated phage genome is known as which of the following?

provirus

Which mechanism of horizontal gene transfer relies on the use of viruses?

transduction

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?

virusoid

Which scientist first discovered prions?

Stanley Prusiner

Which method cannot be used to detect virus in a patient's serum?

growth in pure culture

Which of the following is the scientist responsible for first discovering viruses (specifically, tobacco mosaic virus)?

Dimitri Ivanovski

(−)ssRNA is transcribed into (+)ssRNA using which of the following?

RNA polymerase encoded by the virus

Which of the following viruses does not cause latent infections?

adenovirus

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?

The test result suggests you may have been exposed to the virus, and your serum contains antibodies against the virus.