BIO 1108 EXAM QUESTIONS AND
ANSWERS A+ GRADED
Structure of a virus
DNA or RNA surrounded by a protein coat
properties of a virus
obligate intracellular parasites, ubiquitous in nature, ultramicroscopic, are not cells,
basic structure consist of protein shell surrounding nucleic acid, either DNA or RNA,
multiply by takin control of host cell's genetic material,
first virus discovered & who discovered it
tobacco mosaic virus (TMV) & Adolf Mayer
3 theories of how viruses evolved
devolution, escapist, side by side
virus shapes
helical, spherical, enveloped, head and tail
steps of virus infections
1. attachment
2. entry
3. replication and assembly
4. egress (exit)
lytic cycle
virus genes kills host cell, makes it into a virus producing factory, cell breaks open
lysogenic cycle
the phage genome replicates without destroying the host cell
non enveloped viruses are also called
naked viruses
acute infection
all of a sudden
chronic infection
extended period of time
asymptomatic
have the infection, but show no symptoms
vaccine
shot to help control viral diseases
Chicken pox can reemerge as which disease?
shingles
prions
infectious proteins that spread disease
viroids
tiny bit of RNA that only infects plants
microbial mat =
stromatolite
transformation
the prokaryote takes in DNA found in its environment that is she by other prokaryotes
ANSWERS A+ GRADED
Structure of a virus
DNA or RNA surrounded by a protein coat
properties of a virus
obligate intracellular parasites, ubiquitous in nature, ultramicroscopic, are not cells,
basic structure consist of protein shell surrounding nucleic acid, either DNA or RNA,
multiply by takin control of host cell's genetic material,
first virus discovered & who discovered it
tobacco mosaic virus (TMV) & Adolf Mayer
3 theories of how viruses evolved
devolution, escapist, side by side
virus shapes
helical, spherical, enveloped, head and tail
steps of virus infections
1. attachment
2. entry
3. replication and assembly
4. egress (exit)
lytic cycle
virus genes kills host cell, makes it into a virus producing factory, cell breaks open
lysogenic cycle
the phage genome replicates without destroying the host cell
non enveloped viruses are also called
naked viruses
acute infection
all of a sudden
chronic infection
extended period of time
asymptomatic
have the infection, but show no symptoms
vaccine
shot to help control viral diseases
Chicken pox can reemerge as which disease?
shingles
prions
infectious proteins that spread disease
viroids
tiny bit of RNA that only infects plants
microbial mat =
stromatolite
transformation
the prokaryote takes in DNA found in its environment that is she by other prokaryotes
