18. Viruses, Viroids, & Prions

Which steps of the lytic and lysogenic cycles are the same?

Some bacterial viruses (lysogenic phages) carry viral DNA that acts like an episome. When a bacterial cell that is infected by a lysogenic phage replicates, what happens to the viral DNA?

A strain of Corynebacterium diphtheriae has been infected by the Phage-beta, and the phage genome has been integrated into the host chromosome. Thus, this Corynebacterium diphtheriae is ______ and the integrated phage genome is a _______.

Place the following in the most likely order for biosynthesis of a bacteriophage: (1) phage lysozyme; (2) mRNA; (3) DNA; (4) viral proteins; (5) DNA polymerase.

a. 5, 4, 3, 2, 1

b. 1, 2, 3, 4, 5

c. 5, 3, 4, 2, 1

d. 3, 5, 2, 4, 1

e. 2, 5, 3, 4, 1

Describe lysogeny.

An example of lysogeny in animals could be

a. slow viral infections.

b. latent viral infections.

c. T-even bacteriophages.

d. infections resulting in cell death.

e. none of the above