Prokaryotes and Bacteria Flashcards
Unit 5
1
Q
prokaryotes are divided into two domains…
A
bacteria and archaea
2
Q
what does the cell wall do?
A
maintain shape, protects cells, prevents cell from bursting in hypotonic environment
3
Q
peptidoglycan
A
network of sugar polymers cross-linked by polypeptides
4
Q
what sugar do archaea contain
A
polysaccharides and proteins but not peptidoglycan
5
Q
gram positive bacteria
A
- simpler walls
- large amnt peptidoglycan
6
Q
gram negative bacteria
A
less peptidoglycan
- toxic outer-membrane
7
Q
what bacteria is more likely to be antibiotic resistant?
A
gram negative
8
Q
fimbriae
A
allow prok. to stick to substrate or others in colony
9
Q
pili (sex pili)
A
longer than fimbriae and allow prok. to exchange DNA
10
Q
Taxis
A
- ability to move toward or away from stimulus
