Classification, Structure, and Replication of Viruses - AuCoin Flashcards
T/F: viruses can pass through a filter
true
Viruses are obligate (blank)
intracellular parasties
T/F: viruses can make energy and proteins independent of a host cell
false
What are the limitations of the viral genome?
it can be DNA or RNA BUT NOT BOTH
What are the two general viral morphologies?
naked capsid or enveloped
What two processes have optimized viruses to infect humans and other hosts?
mutation and selection
What is a important characteristic of the genes a virus encodes to ensure its survival?
it must code for any process not provided by the host cell and its components MUST SELF ASSEMBLE
What types of cellular components do viruses hijack?
polymerases and transcription factors
structural proteins and enzymes and nucleic acid binding proteins all together form the (blank)
nucleocapsid
A nucleocapside and a glycoprotein and a membrane make a (blank)
enveloped virus
Papilloma virus, adenovirus, and polio viruses are all (blank) viruses
naked capsid viruses
herpesvirus and retrovirus are both (blank) viruses
enveloped viruses
Hepatitis A virus is a (blank) virus, while all other hepatitis viruses are RNA viruses
DNA
What are the means of classifying viruses?
- structure: size, morph, and nucleic acid
- BCH characteristics like structure and mode of rep
- disease (encephalitis)
- means of transmission
- tissue or organ affected
what is viral tropism?
when a virus preferentially targets a specific tissue type
Picornavirus is a example of (blank) naming
structural
Retroviruses is an example of (blank) naming
BCH
adenoviruses and reoviruses are examples of (blank) naming
tropism
Pox, herpes, and hepadna viruses are all (blank) DNA viruses
enveloped
Polyoma, papilloma, adeno, and parvo viruses are all (blank) DNA viruses
enveloped
Parvovirus is special because it is (ds/ss) DNA
ssDNA
+ RNA is equal to (blank)RNA
mRNA
What is the unit of measurement for viruses? How do they compare to the size of staph?
nanometers, 1/4 the size
T/F: larger virions hold larger genomes and are therefore more complex
true