Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
8 Cards in this Set
- Front
- Back
|
Virus
|
A small, nonliving particle that invades and then reproduces inside a living cell. Viruses are not cells. They do not use energy to grow or to respond to their surroundings. They cannot make food, take in food, or produce wastes. They can also cause disease in organisms other than humans.
|
|
|
Host
|
A organism that provides a source of energy or a suitable environment for a virus or for another organism to live.
|
|
|
Parasite
|
An organism that lives on or in a host and causes harm to the host.
|
|
|
Bacteriophage
|
A virus that infects bacteria.
|
|
|
Parts of Viruses
|
1) the outer coat that protects the virus
2) the inner core made of genetic material |
|
|
How Viruses Multiply
|
After a virus attaches to a cell, it enters the cell. Once inside, a virus's genetic material takes over the cell's functions. The genetic material directs the cell to produce the virus's proteins and genetic material. These proteins and genetic material are then assembled into new viruses. Some viruses take over the cell's functions immediately. Other viruses wait for a while.
|
|
|
Active Viruses
|
They enter cells and immediately begin to multiply, leading to the quick death of the invaded cells.
|
|
|
Hidden Viruses
|
They hide for a while inside the host cells before they become active.
|
