compare viruses and bacteria Flashcards
1
Q
cell number
A
bacteria = single celled viruses = non-cullular
2
Q
size
A
bacteria = seen with a light microscope viruses = seen with an electron microscope
3
Q
reproduction
A
bacteria = binary fission viruses = requires host cell to repoduce
4
Q
outer layer
A
bacteria = cell membrane viruses = lipid - protein coat
5
Q
nucleus
A
bacteria = absent (prokaryotic) viruses = absent - DNA/RNA inside protein envelope
6
Q
cell wall
A
bacteria = present viruses = absent
7
Q
harm to host
A
BACTERIA
- Can form resistant spores that can remain dormant inside host until conditions are favourable
- Produce toxins and enzymes that damage tissue or disrupt cellular functioning
VIRUSES
- Changes cell metabolism
- Causes cell lysis
- Causes cell to become cancerous (rapidly divide)
- Releases harmful toxins
- Changes characteristics of cell causing immune response to destroy cell
