Exercise 10

virus

A small, obligate, intracellular parasite that consists of a protein coat enclosing a nucleic acid (DNA or RNA).

the organsim they infect

viruses can be classified based on-

Outside the host

Viruses cannot increase in number when they are-

2 stages

How many stages do viruses have in their life cycle?

stage 1

this stage is the extracellular dormant, and inactive stage

stage 2

this stage is the intracellular reproductive stage, where the virus takes over host cell machinery to produce progeny viruses.

absorption to the host, specific receptors

All viruses begin infection via ___ to the host via ___

the nucleic acid

In the eclipse period of viral infection, no new viral cells can be detected in the host because of the release and incorporation of the what?

lysis

After new viral particles are produced, assembled, they are released from host via what?

lytic, virulent

Viruses that cause lysis are called ___ or ___ phages

cell division

Lysogenic or avirulent phages only activate and cause lysis after many generations of host ___