pathogens 1.4

Question 1

what’s a pathogen?

Answer 1

a microorganism that causes diseases, they harm the host by releasing damaging cells or toxins

all viruses are pathogens

bacteria, protoctista, fungi can also be pathogens

Question 2

what’s a virus?

Answer 2

a non-living organisms

only reproduce inside host cells (parasitic) - take over ribosomes and enzymes to make new virus particles.

they have no cells

contain a protein coat and strand of (genetic material) nucleic acids (DNA RNA)

Question 3

examples of viruses:

Answer 3

tobacco mosaic virus
-causes discolouration of the leaves of tobacco plants by preventing the formation of chloroplasts and limiting plant growth

influenza virus
-causes flu

HIV virus
-causes AIDS
- weakens the immune system