HIV and aids Flashcards
are viruses considered living ?
no
why is difficult to destroy viruses ?
they live inside host cells so the cell would most likely be harmed
why can’t they be destroyed by antibiotics ?
they replicate diffrently
what is the genetic material in HIV?
RNA
what is in the core of HIV?
RNA , enzyme reverse transcriptase,
whats in the capsid of HIV?
outer protein coat
whats in the envelope of HIV ?
extra outer layer made of membrane taken from hosts cell membrane
what do the attachment proteins do ?
on the exterior of the envelope to enable the virus to to attach to the hosts helper T cell. Enables the cells to attach to the hosts helper T cells
describe of HIV replicates ?
HIV is transported around the blood until it attaches to to a CD4 protein on a helper T cell .
THe HIV protein capsule then fuses with the helper T cells membrane .ENabling RNA and enzyme from HIV to enter .
The HIV enzyme reverse transcriptase copies the viral RNA into a DNA copy and moves to the helper T cell nucleus , this is why it is called a retrovirus .
Here mRNA is transcribed and and the helper t cell starts to create viral proteins to make new viral particles
what is the diffrence between HIV and AIDS ?
HIV positive is when a person has HIV .
AIDS is when the replicating viruses in the helper T cells interfere with their normal functioning of immune system .
why is AIDS so bad ?
helper T cells being destroyed by virus , the host is left unable to produce an adequate immune response to other pathogens and is left vulnerable to infections and cancer
what part of HIV can lead to death ?
destruction of immune system
