bacterial structure & growths Flashcards Preview

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Flashcards in bacterial structure & growths Deck (27)
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1
Q

Similarities between bacteria and eukaryotes

A
biochem units
amino acids
nucleotides
fatty acids
vitamins
energy metabolism
biosynthesis
2
Q

Difference between bacteria and eukaryotes

A

Cell wall
70S ribosome
No ER/mitochondria
No mitotic spindles

3
Q

Porins are on ___

A

Gram negative

4
Q

Periplasmic space are in ___

A

Gram negative

5
Q

Outer membrane are on ____

A

Gram negative

6
Q

Pili on ___

A

both

7
Q

lipopolysaccharides (LPS) are on ___

A

Gram negative

8
Q

Teichoic acids are on ___

A

Gram positive

9
Q

Lipoteichoic acids are on ___ function to ____

A

Gram positive, anchor cell wall to membrane

10
Q

Cytoskeleton for bacterial (3) (what, similar eukaryotic, function)

A

Ftz - tubulin - division
MreB - actin - shape/polarity/chrom separation
CreS - intermediate filaments - shape

11
Q

LPS located on?

A

gram neg, outter leaflet of outer membrane

12
Q

LPS parts

A

Lipid A - endotoxins
Core polysaccharides
O side oligosacchardies (somatic antigens = O antigens)

13
Q

Energy sources (2)

A

ATP

Electron transport system (proton motive force)

14
Q

Significance of nucleoid (vs nucleus)

A

Transcrption and translation happens simultaneously

15
Q

Bacterial growth curve: Lag phase

A

Inoculum - adjustment to new evironment - proper intracellular environment to optimal grow

16
Q

Bacterial growth curve: Exponential phase

A

Rate proportional to amount of bacteria

Doubling/generation time

17
Q

Bacterial growth curve: Stationary phase

A

Grow = death; nutrition vs toxin

18
Q

Bacterial growth curve: Death phase

A

decline - spontaneous cell lysis/autolysis

19
Q

Aerobes characteristics

A

need O2, cannot ferment

20
Q

Anaerobes characteristics

A

Kill by O2, only ferments

21
Q

Indifferent

A

aerobic tolerant - will ferment

22
Q

Facultative

A

respire with O2, ferment with O2

23
Q

Microerophilic

A

best with low O2

24
Q

Fermentation vs respiration

A

Ferm: organic compound - e- donnor & acceptor - no net oxidation
Resp: electron transport system
- Use O2 or amino acids/nitrate/nitrite as final e acceptors

25
Q

sporulation

A

turns to spores - dehydrated, resistant, no metabolic activity

26
Q

Germination

A

spore –> vegatative state when conditions improves

27
Q

Antimicrobials targets:

A
cell wall
outer/cytoplasmic membrane
ribosomes
nucleic acid syn
metabolic inhib