Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Virus
| Question | Answer |
|---|---|
| all viruses are considered what | parasites |
| viruses can only be seen with what kind of microscope | electron |
| 4 qualities of life | composed of one or more cells, grow, use energy to maintain survival, reproduce |
| traits of life viruses show | carry genetic info for reproduction, respond to changes in environment, can evolve and adapt to environment |
| nonliving traits viruses show | lack cell membrane, no metabolism, don't grow, don't use own energy for reproduction,can only reproduce in host cell, no signs of life when outside cell, obligate intracellular parasites |
| broad based viruses | viruses that can affect many different animals |
| viruses can only invade cells with the correct __________ on the cell membrane that the virus can connect to | receptor |
| what method do viruses use to see which cell they can enter? | lock and key |
| bacteriophages | viruses that infect bacteria |
| docking | viruses use proteins on cells outer coat to latch onto a cell membrane so it can enter |
| penetration | goes through the cell membrane and into the host cytoplasm |
| biosynthesis | making of the viral components |
| maturation | virus parts assemble themselves |
| release | cell breaks open killing it and releases virus to infect other cells |
| lytic infections | virus that can harm the cell |
| lysogenic infection | provirus that will replicate with other DNA when the cell divides but does not harm the cell |
| provirus | virus that does not harm cell |
| how can a lysogenic virus become lytic | when something signals it and new viruses are created and the cell bursts releasing it |
| retroviruses | use RNA instead of DNA. contain a code that produces an enzyme that converts the RNA into DNA |
| three ways viruses go from human to human | through the air or contact with infected surfaces, direct physical contact, exposure to blood of an infected person. |
| do antibiotics work on viruses? | no |
| how does a vaccine work | inject a harmless virus into body which will cause immune system t recognize invader and develop antibodies to recognize and kill it if encountered again |
| who developed the first vaccine? | Edward Jenner |
| can vaccines cure viral infections? | no they can only help prevent them |
| interferon | protein produced by cells in your body when exposed to a virus |
| what do interferons do | interfere with the ability of a virus to enter the cell and replicate |
| antiviral drugs | drugs used to treat viral infections. do not harm virus, just greatly slow down their reproduction inside cells |
| viral therapy | when a gene is inserted into the cells of a person who does not have that gene |
| example of viral therapy | insulin for diabetes |
| how do scientists make a virus for gene therapy? | remove infectious DNA and insert a gene |
Created by:
edenbreslauer
Popular Biology sets