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

Lec 3-3 - Bacteria Structure / Function Flashcards

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Biology 101 flashcards
1
Q

guy who discovered bacteria

A

leeuwenhoek

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2
Q

bacteria size

A

.2 micrometer diameter

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3
Q

bacteria is blank compared to virus

A

larger

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4
Q

spherical bacteria

A

coccus

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5
Q

rod bacteria

A

bacillus

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6
Q

spiral bacteria

A

spirilla/spirochete

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7
Q

intermediate shaped bacteria

A

coccobacillus, vibrio

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8
Q

pair of cocci

A

diplococcus

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9
Q

chain of cocci

A

streptococcus

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10
Q

large cluster of cocci

A

staphylococcus

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11
Q

gram positive stains blank

A

blackish dark

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12
Q

gram negative stains blank

A

red (safranin)

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13
Q

bacteria not stained by gram stain does not have a blank

A

cell wall

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14
Q

stain that can be used to stain bacteria without cell wall

A

acid fast

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15
Q

strep mutans is blank

A

gram positive

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16
Q

mycoplasma does not have a cell wall and stains with blank

A

fluorochrome

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17
Q

bacteria has one circular chromosome dna called a blank

A

nucleoid

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18
Q

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

A

mesosome

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19
Q

blank form bacteria do not have cell walls

A

L

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20
Q

four things needed for viability

A

cell wall, membrane, ribosomes, nucleoid

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21
Q

these are for energy storage

A

storage granules

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22
Q

these are for adherence, secretion

A

pili, fimbriae

23
Q

these are for motility/chemotaxis

A

flagella

24
Q

this is for antiphagocytosis and adherence

A

capsule

25
Q

cell membrane of bacteria do not have blank

A

sterol

26
Q

only two bacteria that have sterol

A

mycoplasma, bacteria that cause lime disease

27
Q

percent of cell membrane that is proteins

A

70%

28
Q

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

A

osmotic, transporter, energy

29
Q

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

A

peptidoglycan

30
Q

peptidoglycan in the cell walls is the target of blank

A

penicillin

31
Q

cell wall prevents osmotic blnk

A

lysis

32
Q

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

A

DAP

33
Q

gram positive have a very blank cell wall

A

thick

34
Q

gram positive uses blank for its cell wall instead of blank

A

L-Lysine, DAP

35
Q

both gram positive and negative use blank in its cell wall

A

D-alanine

36
Q

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

A

teichoic acid

37
Q

gram positive have blank cell membranes

A

1

38
Q

gram negative have blank cell membranes

A

2

39
Q

gram blank is less sensitive to antibodies because of cell membranes

A

negative

40
Q

space between outer and inner membrane that only gram negative has

A

periplasmic space

41
Q

gram negative has this which gram positive does not

A

LPS

42
Q

LPS is toxic and can cause fever and blank

A

shock

43
Q

three components of lps

A

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

44
Q

o antigen varies between species and strains like blank

A

antigenic determinants

45
Q

lps remains blank even if the bacteria is dead

A

immunoactive

46
Q

thick polysaccharide attached to cell wall or membrane

A

capsule

47
Q

thin polysaccharide attached to cell wall or outer membrane

A

slime layer

48
Q

capsule is hydrophilic and does not blank

A

stain

49
Q

how to stain bacteria with capsule

A

negative stain

50
Q

pili for adhesion and sticking to host

A

common

51
Q

pili for exchange between gram negative bacteria

A

sex pili

52
Q

three parts of flagella

A

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

53
Q

three rings of flagella

A

MS, P, L

54
Q

this causes the mechanic force of flagella

A

proton gradient

Dental Microbiology (47 decks)

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