Virusus Flashcards
What are viruses
They are a collection of molecules
Are viruses living or non living
No living
Where does a virus have to be in order to replicate
In a host cell
Why do viruses invade a host cell
To use the protein production machinery so they can replicate
What happenes to the host cell when all of the virus cells fill it
It busts therefore the cell dies
If a virus invades a skin cell what are some viruses it could cause
Smallpox
Chickenpox
What are the differences between a bacteria and virus cell
Viruses
Non living
20-400nm so smaller
Invades host cells to reproduce
No oragnelles
Bacteria
Living cellular organism
Larger 1000nm
Reproduces by asexual fission
Contains organelles
Inside a virus what things code for genetic material
RNA
what is the dna/ RNA found in in a virus cell
a protien coat called the capsid
what are the sticks on the virus called
attachment protiens
what do the attachment protiens attach to in order to get into the host cell
a receptor
what is a retrovirus
HIV
Why id HIV a retrovirus
because it has an ensyme called a reverse transcriptase which genertaes DNA from HIV’s RNA
the single helix (RNA)
turns into
a double helix (DNA)
how does HIV spread in the cells
so it will attach to the host cell though a receptor then it will use reverse transcriptase to change from RNA to DNA creating a genome so the virus cells can use the organells (eg ribasomes) to reproduce until it pops and then they can invade other cells and repeat until there are a lot of virus cells taking over the body.
