Lec 3-3 - Bacteria Structure / Function Flashcards Preview

Dental Microbiology > Lec 3-3 - Bacteria Structure / Function > Flashcards

Flashcards in Lec 3-3 - Bacteria Structure / Function Deck (54):
1

guy who discovered bacteria

leeuwenhoek

2

bacteria size

.2 micrometer diameter

3

bacteria is blank compared to virus

larger

4

spherical bacteria

coccus

5

rod bacteria

bacillus

6

spiral bacteria

spirilla/spirochete

7

intermediate shaped bacteria

coccobacillus, vibrio

8

pair of cocci

diplococcus

9

chain of cocci

streptococcus

10

large cluster of cocci

staphylococcus

11

gram positive stains blank

blackish dark

12

gram negative stains blank

red (safranin)

13

bacteria not stained by gram stain does not have a blank

cell wall

14

stain that can be used to stain bacteria without cell wall

acid fast

15

strep mutans is blank

gram positive

16

mycoplasma does not have a cell wall and stains with blank

fluorochrome

17

bacteria has one circular chromosome dna called a blank

nucleoid

18

this might be involved in chromosome dna separation but ultimately has an unknown function

mesosome

19

blank form bacteria do not have cell walls

L

20

four things needed for viability

cell wall, membrane, ribosomes, nucleoid

21

these are for energy storage

storage granules

22

these are for adherence, secretion

pili, fimbriae

23

these are for motility/chemotaxis

flagella

24

this is for antiphagocytosis and adherence

capsule

25

cell membrane of bacteria do not have blank

sterol

26

only two bacteria that have sterol

mycoplasma, bacteria that cause lime disease

27

percent of cell membrane that is proteins

70%

28

cell membrane is important as a blank barrier, a blank of nutrients, and a producer of blank

osmotic, transporter, energy

29

cell wall is made mostly out of blank and is unique to bacteria

peptidoglycan

30

peptidoglycan in the cell walls is the target of blank

penicillin

31

cell wall prevents osmotic blnk

lysis

32

bacteria has blank in the cell wall that prevents cleavage by peptase

DAP

33

gram positive have a very blank cell wall

thick

34

gram positive uses blank for its cell wall instead of blank

L-Lysine, DAP

35

both gram positive and negative use blank in its cell wall

D-alanine

36

these are usually electrically charged and are for gram positive (not gram negative) adherence to host cell

teichoic acid

37

gram positive have blank cell membranes

1

38

gram negative have blank cell membranes

2

39

gram blank is less sensitive to antibodies because of cell membranes

negative

40

space between outer and inner membrane that only gram negative has

periplasmic space

41

gram negative has this which gram positive does not

LPS

42

LPS is toxic and can cause fever and blank

shock

43

three components of lps

lipid a (toxic part), core polysaccharide, o antigen (glycan polymer)

44

o antigen varies between species and strains like blank

antigenic determinants

45

lps remains blank even if the bacteria is dead

immunoactive

46

thick polysaccharide attached to cell wall or membrane

capsule

47

thin polysaccharide attached to cell wall or outer membrane

slime layer

48

capsule is hydrophilic and does not blank

stain

49

how to stain bacteria with capsule

negative stain

50

pili for adhesion and sticking to host

common

51

pili for exchange between gram negative bacteria

sex pili

52

three parts of flagella

basal body (innermost), hook, filament (propeller)

53

three rings of flagella

MS, P, L

54

this causes the mechanic force of flagella

proton gradient