It’s 19-2, yo. Alix Vinson and Nicole Poling. Viruses. Oh yum. Viruses are particles of nucleic acid, protein, and in some cases, lipids that can only replicate by infecting living cells. That’s the definition. Please copy it. Facts About Viruses.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
It’s 19-2, yo.
Alix Vinson and Nicole Poling
Viruses are particles of nucleic acid, protein, and in some cases, lipids that can only replicate by infecting living cells.
That’s the definition. Please copy it.
- The capsid is really quite convenient and allows the virus to enter a cell by binding to the receptors of the cell. Clever.
- The cell transcribes and translates the viral genetic information into viral capsid proteins and bam. The virus is spread
- The host cell makes copies of the virus and, in doing so, is destroyed.
When the virus has begun to spread around the cell two different processes may occur.
Lytic Infection: when the host cell is lysed and destroyed.
- In a lytic infection, a virus enters the cell, makes copies of itself, and causes the cell to burst.
Lysogenic Infection: a host cell makes copies of the virus indefinitely
- In lysogenic infection a virus integrates it’s DNA into the DNA of the host cell and the viral genetic information replicates along with the host cell’s DNA.
prophage: the viral DNA that is imbedded in the host DNA
-Prophage may remain part of the DNA of the host cell for many generation before becoming active.
Viruses ARE NOT alive because they live off of living things. They have many characteristics of living things such as: