Microbiology Chapter 13

T/F Viruses can have one of three common shapes, Icosahedral, helical, complex

True

Bacteriophages are the most numerous biological entities on Earth

with an estimated 10^31 existing.

T/F All viruses must separate their nucleic acid from the capsid before replication.

True

T/F The burst size for bacteriophage T4 is about 200 viruses.

True

Rhinovirus (cold) is an example of a lytic virus

while Herpes simplex I is a lysogenic virus.

T/F Lysogenic conversion happens when bacteria produce toxins due to viral genes.

True

T/F The restriction-modification system is an immune-like system in bacteria that protects them from viral infections.

True

T/F Eukaryotic host cells have tens to hundreds of thousands of receptors for viruses.

True

T/F Acute viral infections like influenza act like lytic bacteriophages.

True

T/F Chronic viral infections like hepatitis B take a long time to propagate.

True

T/F Persistent viral infections are analogous to lysogenic bacteriophages.

True

T/F Prions violate the central dogma of replication by not using nucleic acid for replication.

True

Bacteriophages are the most biological entities on Earth with an estimated 10^31 existing.

abundant

All viruses must separate the from the capsid before replication.

nucleic acid

The burst size for bacteriophage T4 is about viruses.

200

Rhinovirus (cold) is an example of a virus.

lytic

Herpes simplex I is an example of a virus.

lysogenic

Lysogenic conversion occurs when bacteria produce due to viral genes.

toxins

The restriction-modification system is an immune-like system in bacteria that protects them from .

viral infections

Eukaryotic host cells have tens to hundreds of thousands of for viruses.

receptors

Acute viral infections like influenza cause symptoms from .

localized tissue damage

Chronic viral infections like hepatitis B are slow .

replicators

Persistent viral infections like herpes simplex I are analogous to bacteriophages.

lysogenic

Prions violate the central dogma of replication by not using as a template for replication.

nucleic acid

Examples of prion diseases include Scrapie,

Mad Cow disease