Home
Flashcards
Preview
BiologyReview4
Home
Get App
Take Quiz
Create
Viruses are considered non-living because:
They cannot reproduce on their own.
They are not made of cells.
They do not carry out cellular processes such as respiration, growth, etc.
They can be crystalized.
Pathogen (define)
Any biological agent that causes a disease.
Virus (define)
A non-living biological particle that infects cells.
Host Cell (define)
The cell that the virus infects.
What is the 1
st
virus discovered, and who discovered it?
The Tobacco Mosaic Virus, discovered by Wendell Stanley.
Viruses are ____ to ____ the size of bacteria
Viruses are 1/2 to 1/100 the size of bacteria.
Viruses are measured in _______
Nanometers
Nanometers are 1 billionth of a meter.
Capsid (define)
The outer coat of protein protecting a virus.
The four shapes of a virus are:
Rod-shaped (helical)
Polyhedral
Complex/Enveloped
Bacteriophage
Lytic Cycle (define)
The cycle of viral infection, replication, and cell destruction.
Lysogenic Cycle (define)
The viral genetic information becomes integrated into the host cell DNA and replicates without destroying the cell.
Vaccine
An injection of a deactivated virus.
Stimulates the immune system to produce antibodies and fight off future infections.
6 Steps of Lytic Cycle
Virus links to host cell.
Virus injects genetic material into host cell.
Virus's DNA (or RNA) takes over that of the host cell.
Building blocks of viruses are made inside the host cell.
Building blocks are used to build more viruses inside host cell.
The multiple viruses burst the host cell.
Bacterial DNA is contained within the _____.
Nucleoid.
T/F Both viruses and cells can be contained within a semi-permeable membrane.
True
False
False.
Author
HannahD
ID
121717
Card Set
BiologyReview4
Description
A set of biology review.
Updated
2011-12-13T00:32:14Z
Show Answers
Home
Flashcards
Preview