VIRUSES, PRIONS, AND VIROIDS

prion, brain

A __________ is an abnormal disease-causing protein which affects the ____________ of the animal or human.

Icosahedral

HIV/AIDS virus

Viroids, Hepatitis D

Naked disease-causing RNA molecules known as ________ cause ___________ in humans.

They are not able to reproduce independently, they do not use energy for metabolism of any kind, and their virulence is maintained by non-living cultures.

Select the reasons why viruses, prions, and viroids are not classified as living organisms.

Complex

T4 bacteriophage

virion

The ________ structure is a single virus unit, including the genetic material and capsid.

envelope structure

The ___________ is the lipid-based membrane surrounding some viruses.

protein

The capsid structure is the _____________ covering of a virus.

False

The viral genetic material structure has nucleic acid molecules in the form of both DNA and RNA.

Helical

Tobacco Mosaic Virus

viral budding

Viruses which typically have a lipid covering called an envelope are released from the host cell through _________.