HIV

Question 1

structure of HIV

Answer 1

core

capsid

envelope

protein attachment

Question 2

core

Answer 2

genetic material

enzyme reverse transcription (needed for viral replication)

Question 3

capsid

Answer 3

outer protein coat

Question 4

envelope

Answer 4

extra outer layers made out of membrane taken from host cells membrane

Question 5

protein attachments

Answer 5

on exterior of the envelope to enable the virus to attach to host helper t cells

Question 6

HIV

Answer 6

has RNA

viruses replicate inside cells making it difficult to destroy them without harming cells

have different mechanisms to replicate

no cell wall - cannot be destroyed by antibiotics

Question 7

HIV formation

Answer 7

1. HIV is transported around in the blood until it attaches to a CD4 protein on helper t cell
2. HIV protein capsule then fuses with helper t cell membrane enabling RNA and enzymes from HIV to enter
3. HIV enzyme reverse transcriptase copies viral RNA into a DNA copy, moves to helper t cells nucleus
4. mRNA is transcribed and helper t cell starts to create viral protein to make new viral particles.

Question 8

HIV positive

Answer 8

when a person is infected with HIV

Question 9

AIDS

Answer 9

the replicating virus in helper t cells interfere with the normal functioning of the immune system

Question 10

symptoms of AIDS

Answer 10

destroys helper t cells - the host is unable to produce an adequate immune response to other pathogens

it is left vulnerable to infections and cancer - destruction of the immune system can lead to death rather than HIV directly