Exam 8: Viruses and Their Replication

T4 genes are transcribed by host RNA polymerase, yet this transcription is carefully controlled so that groups of T4 genes are transcribed in a specific order after infection. How is this accomplished?

Bacteriophagesʹ genomes are typically composed of

The use of ________ is the easiest and most effective way of studying many animal and plant viruses.

Explain the potential advantages of lysogeny versus lysis for a temperate virus.

In a natural population of diverse slow-growing prokaryotic cells, what type of viruses would you expect to be most common?

Which statement is TRUE?

Cellular receptors may be composed of

A naked virus lacks a capsid.

For bacteriophages and animal viruses ________ is the step in the viral life cycle that determines host cell specificity.

What would be the consequence of deleting the late T4 genes?

Virus assembly requires host cell mediated reactions.

Describe the establishment and maintenance of the lysogenic state in the lambda phage.

An RNA genome itself serves as mRNA in negative-stranded RNA viruses.

When packaged in the virion, the complete complex of nucleic acid and protein is known as the virus

A lytic infection results in death of the host cell.

A virus that kills its host is said to be

Viruses infecting ________ are typically the easiest to grow in the laboratory.

The reason dogs do not get measles is because their cells lack the correct receptor sites for that virus.

Restriction is

Regarding the viral membrane of an enveloped virus, the lipids are derived from the ________, and the proteins are encoded by ________.