Viruses and STIs

Question 1

what is a virus?

Explain where they can reproduce

Answer 1

not cells,protein coat around a strand of genetic material.
only in host cells
specific types of viruses only infect specific cells

Question 2

Name and explain a serious STI

Answer 2

HIV-Human Immunodeficiency Virus-leads to AIDS
deteriates immune system ,eventually fails,vulnerable to other pathogens
spread thro bodily fluids ,blood,semen and vaginal fluids
wear condom,avoid sharing needles,medication reduce risk of it

Question 3

Name an STI

Answer 3

Chlamydia-bacterium similar to virus -reproduces only in host cell
doesnt always have symptons,infertility condom,screening individuals so they can be treated for infection
or avoid sexual contact

Question 4

Explain the life cycle of a virus in lytic pathway

Answer 4

attaches itself to specific host cells and injects genetic material into it
virus uses proteins and enzymes in h cell to replicate g material and produce components for new viruses
viral c assemble
host cell splits open releasing new viruses infect more cells

Question 5

sometimes a virus can start with the lysogenic pathway

explain this

Answer 5

injected genetic material incoporated into genome of host cell
viral g material gets replicated along with host DNA each time cell divides
Birus is dormant and no new virus made
eventually chemical causes viral genetic m to leave genome and enter lytic pathway.