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Bacte LEC > BACTERIAL CELL: STRUCTURES & FUNCTIONS > Flashcards

BACTERIAL CELL: STRUCTURES & FUNCTIONS Flashcards

(49 cards)

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1
Q

Bacteria

(formerly_______)

A

eubacteria

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2
Q

Characteristics of bacteria

A

Procaryotic (no nuclear membrane) Unicellular
Free living
Composed of RNA and DNA
Multiply by binary fission

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3
Q

Archaea (formerly_____)

Kingdom_____

A

Procaryotes

Archaebacteria

Monera

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4
Q

BACTERIAL MORPHOLOGY

SIZE:

A

0.2 – 2.0 µm by 1-10 µm

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5
Q

Size

Staphylococcus aureus -
Escherichia coli –
Thiomargarita namibiensis

A

0.5-1.5 µm in diameter

2 µm in length

100-750 µm

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6
Q

Bacteria

Shapes

A

SHAPE: spherical, rod-shaped, spiral

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7
Q

Bacteria arrangement

A

Cocci
Bacilli
Spiral

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8
Q

– sphere-shaped bacterium

A

Coccus

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9
Q

COCCI

A

diplococci
staphylococci
streptococci
tetrad
octad (sarcina)

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10
Q

– rod-shaped bacterium

A

Bacillus

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11
Q

BACILLI

A

in singles
diplobacilli
streptobacilli
coccobacilli
palisade (fence-like)

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12
Q

– rigid, helical cell wall, single flagella at each end

A

Spirillum

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13
Q

– corkscrew, axial filaments/internal flagella

A

Spirochete

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14
Q

Procaryotic cells have three architectural regions
________(proteins attached to the cell surface) in the form of flagella and pili;

________ consisting of a capsule, cell wall and plasma membrane;

________that contains the cell genome (DNA) and ribosomes and various sorts of inclusions.

A

appendages

cell envelope

cytoplasmic region

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15
Q

Filamentous protein attached to the cell surfaces that provide swimming movement

A

Flagella

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16
Q

Parts of a flagella

A

Filament
Hook
Basal body

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17
Q

Rotates to move (360)

A

Flagellum

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18
Q

H antigen

Hauch

A

Flagellin

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19
Q

Flagellar Arrangement

A

(a) Monotrichous
(b) Amphitrichous
(c) Lophotrichous
(d) Peritrichous

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20
Q

______have flagella which project in all directions.

______rotation of flagellar motors results in random re-orientation for the bacterium, but ______rotation produces approximate straight-line motion.

Study These Flashcards
A

E. coli

Clockwise (CV)

counter-clockwise (CC)

21
Q

Internal Flagella

Filaments

Study These Flashcards
A

Axial Filaments
Periplasmic filaments

22
Q

enclosed between cell wall & cell membrane of spirochetes

Motility (corkscrew fashion)

Study These Flashcards
A

Internal flagella

23
Q

•_____ affect critical biological functions including nutrient acquisition, motility, dispersion, stress resistance, and interactions with other organisms.

24
Q

Filamentous
Some of them form branching filaments resulting in a network of filaments called_____

25
Sometimes slightly flatten when they are adjacent to one another
Cocci
26
Many spirilla are rigid and capable of movement especially group of ______are long, slender, and flexible
Spirochetes
27
DIPLOCOCCI Examples
• Streptococcus pneumoniae • Moraxella catarrhalis • Neisseria gonorrhae
28
TETRADS
• Aerococcus • Pediococcus • Tetragenococcus
29
STREPTOCOCCI Cocci in chains
• Streptococcus pyogenes • Streptococcus agalactiae
30
STAPHYLOCOCCI Cocci in clusters
• Staphylococcus aureus
31
SARCINA Cocci in cubes consisting of eight cells
• Sarcina ventriculi • Sarcina ureae
32
Cocci in chains
STREPTOCOCCI
33
Cocci in clusters
STAPHYLOCOCCI
34
Cocci in cubes consisting of eight cells
SARCINA
35
BACILLI Most bacilli appear as…
single rods
36
DIPLOBACILLI
• Coxiella burneti • Moraxella bovis • Klebsciella rhinoscleromatis
37
Appear in pairs after division
DIPLOBACILLI
38
SINGLE ROD
• Bacillus cereus
39
Arranged in chains as the cells divide in one plane
STREPTOBACILLI
40
STREPTOBACILLI
• Streptobacillus moniliformis
41
Short and stumpy that they appear ovoid They look like coccus and bacillus
COCCOBACILLI
42
COCCOBACILLI
• Haemophilus influenzae • Gardnerella vaginalis • Chlamydia trachomatis
43
Curved bacteria that can range from a gently-curved shape to a corkscrew-like spiral
SPIRILLA
44
Comma shaped bacteria with less than one complete turn or twist in the cell
VIBRIO
45
VIBRIO
• Vibrio cholerae
46
Rigid spiral structures, spirillum with many turns can superficially resemble spirochetes They do not have outer sheath and endoflagella but have typical bacterial flagella
SPIRILLUM
47
SPIRILLUM
• Campylobacter jejuni • Helicobacter pylori • Spirillum winogradskyi
48
Have a helical shape and flexible bodies, move by means of axial filaments which look like flagella contained beneath a flexible external sheath, but lack typical bacterial flagella
SPIROCHETES
49
SPIROCHETES
• Leptospiral spp. • Treponema pallidum • Borrelia recurrentis

Bacte LEC (51 decks)

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