Viruses
DNA viruses and RNA viruses
What are the two classifications of viruses?
lytic cycle and lysogenic cycle
What are the two processes by which a virus can reproduce itself once inside the host cell?
envelope
What do some viruses have surrounding their capsids?
host cell
What do viruses need in order to survive?
HIV
What is an example of a retrovirus?
polehydral
What is the common shape of a virus?
DNA or RNA
What is the inner core of a virus made up of?
capsid
What is the virus's outer coat of protein that surrounds the DNA or RNA called?
bacteriophage (phage)
a virus that infects a bacterium
lysogenic cycle
reproduction process in which the virus does not act immediately; could take years for symptoms to appear
lytic cycle
reproduction process in which the virus immediately takes over and begins overpowering the host cell
RNA virus
some enter the cell and make new proteins directly from the RNA
RNA virus
the classification of viruses that changes constantly
DNA virus
the more stable of the two virus classifications
retrovirus
type of RNA virus that uses an enzyme called Reverse Transcriptase to make DNA which can then be integrated into the host cell's chromosome or used to make protens
False (Each virus can usually only attach to a few kinds of cells or to a specific species of organisms.)
True or False: Each virus can usually attach to many kinds of cells and organisms.
True
True or False: Once you receive a vaccine, the next time a virus is detected in your body, antibodies will already be in the blood ready to attack the virus.
True
True or False: Plants can get viruses.
False
True or False: Vaccines guarantee 100% protection against viruses.
False (Vaccines often give a nonvirulent or a weakened form of a live virus.)
True or False: Vaccines often give a virulent or a live form of a virus.
True
True or False: Viruses are non-living.
False (Viruses can only be seen with an electron microscope)
True or False: Viruses can be seen with a light microscope.
antibodies
Vaccines help your body to recognize these viral cells as "foreign invaders" and mount a defense against them in the form of what?
metabolism
After attachment, the virus enters the host cell and takes over its what?
DNA viruses
For which type of viruses can vaccines be developed?
receptor site
The place where the virus recognizes and attaches to the plasma membrane of a host cell is called what?
virulent
causes disease
host
cell in which the virus replicates
temperate
does not cause a disease right away; can remain dormant (inactive) for some time
nonvirulent
does not cause disease
DNA virus
may produce new RNA which in turn makes more viral proteins