Exam 21: Viral Diversity

The three enzymatic activities of reverse transcriptase are activity, synthesis of DNA with a(n)_______ template, and synthesis of DNA with a(n)_______ template.

Describe the rolling circle replication mechanism for ssDNA genomes.

Describe one use of bacteriophage Mu for a bacterial geneticist, and explain why it is useful.

Influenza virus proteins are synthesized within the host's

Explain the relationship between permissive cells, nonpermissive cells, and transformed cells.

How many coat proteins per virion do bacteriophages have that contain RNA genomes?

Viruses often make large ________ that are then cleaved into several smaller ________ by proteases.

Explain the relationship between rabbit myxomatosis virus and the Australian rabbit population.

Spindle- shaped viruses have been shown to infect only

Mu is a _______ virus with a ________ tail.

The three classes of mRNA in herpesviruses are_______ , _______, and_______ .

T7, lambda, and Mu each use a different strategy to replicate their ends.

Cytomegalovirus, present in 50- 85% of adults in the United States, normally lays dormant in healthy individuals but can cause disease or even death in immune- compromised humans.

It is estimated that viruses lyse up to half of all bacterial cells in the ocean each day.

It is estimated that viruses outnumber living cells by a factor of_______ in the environment.

Reverse transcriptase is unique to the retroviruses.

Which cell- encoded protein is NOT involved in the conversion of viral ssDNA to RF DNA?

The phenomenon of overlapping genes is more common in small viral genomes than any other grouping.

Is there a certain type of virus morphology that is especially known to cause disease in humans? Explain your reasoning.

Viruses that infect the hyperthermophilic Archaea tend to contain genomes that are composed of