Microbiology: Microbiology Flashcards


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created 3 years ago by RNbonner70
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Microbiology
Chapter 13
Viruses, Viroids, and Prions
Subjects:
microbiology
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1

Obligatory intracellular parasites

Require living host cells to multiply,

• Contain DNA or RNA

• Contain a protein coat

• No ribosomes

• No ATP-generating mechanism

2

Host Range

• The spectrum of host cells a virus can infect

• Most viruses infect only specific types of cells in one host – Determined by specific host attachment sites and cellular factors

3

Bacteriophages

viruses that infect bacteria

• Range from 20 nm to 1000 nm in length

4

Virion

complete, fully developed viral particle

Nucleic acid—DNA or RNA can be single- or doublestranded; linear or circular

5

Capsid

protein coat made of capsomeres (subunits)

6

Envelope

lipid, protein, and carbohydrate coating on some viruses