Science Chapter 7.3 What are Viruses?
What does an active host cell do to the host cell after it is inside of it?
destroys the host cell.
What happens after a virus replicates? What does there DNA or RNA do?
their DNA or RNA frequently mutates, enabling them to adjust to changes in their host cell.
What happens right after a virus infects a person?
their body begins to make antibodies.
What do people realize when they have latent disease?
they have not even known they had it
What is one good way to prevent viral disease?
to stay away from animals or humans
Why have viruses been used by scientists?
to treat genetic disorders and cancer gene transfer
What causes symptoms or diseases?
When Most viruses attack and destroy specific cells
Replication
When a virus can make copies of itself
What does a virus not have?
a cell wall, a nucleus, or any other organelles present in cells.
Vaccine
a mixture containing material from one or more deactivated pathogens, such as viruses.
Antibody
a protein that prevents an infection in your body.
What 2 things can a virus be when it enters a host cell?
active or latent
What does the vaccine trigger the production of?
antibodies
What are some shapes of Viruses?
crystal, cylinder, sphere, and bacteriophage shapes.
What do latent viruses go through?
inactive stage and their genetic material becomes part of the host cell's genetic material.
Why is a virus not a living thing?
it does not have all the characteristics of a living organism
What happens after a virus attaches to a host cell?
its DNA or RNA enters the host cell.
HIV
might not cause symptoms right away because the infected cells might continue to function normally for a period of time after infection.
What develops when a mother passes antibodies onto her unborn baby?
natural immunity
What are viruses not able to do since they have no organelles?
not able to take in nutrients or use energy
What do viruses need to carry on the processes that we usually associate with a living cell?
organisms
When can a virus attach to a host cell? What does it need to have?
specific molecules on its cell wall or cell membrane.
What happens when the DNA or RNA enters the host cell?
starts to replicate or becomes latent.
Virus
strand of DNA or RNA surrounded by a layer of protein that can infect and replicate in a host cell.
What happens once a virus becomes active?
takes control of the host cell and replicates.
What do antibodies bind to and why?
viruses and other pathogens to prevent them from attaching to a host cell
Host Cell
viruses must live inside these to replicate