Prokaryotic Cells and Structure Flashcards Preview

Microbiology > Prokaryotic Cells and Structure > Flashcards

Flashcards in Prokaryotic Cells and Structure Deck (35)
Loading flashcards...
1

cocci (s., coccus)

spheres

2

diplococci

pairs

3

staphylococci

grape-like structures

4

streptococci

chains

5

tetrads

4 cocci in square

6

sarcinae

cubic configuration of 8 cocci

7

bacilli (s.,bacillus)

rods

8

coccobacillli

very short rods

9

vibrios

resemble rods, comma shaped

10

spirilla (s., spirillim)

rigid helices

11

spirochetes

flexible helices

12

mycelium

network of long, multinucleate filaments

13

pleomorphic

organisms that are variable in shape

14

+ usually composed of polysaccharides
+ well organized and not easily removed from cell

capsules

15

similar to capsules except diffuse, unorganized and easily removed

slime layers

16

extended from the surface of the cell; composed of polysaccharides

glycocalyx

17

antiphagocytic, antimicrobial (virulence factor)

Function of surface layers

18

food storage material sequestering divalent cations

Function of surface layers

19

structural

Function of surface layers

20

protection from viral infection or predation by bacteria

Function of surface layers

21

protection from chemicals in environment

Function of surface layers

22

facilitate motility of gliding bacteria

Function of surface layers

23

protection against osmotic stress

Function of surface layers

24

a stain which stains the background against the uncolored capsule can be seen (India Ink)

Negative staining

25

differential stain which selectively stains external capsules surrounding bacterial cells (Crystal violet/CuSO4)

Special capsule staining

26

inclusion bodies

storage of carbon, phosphate, and other substances

27

ribosomes

80S eukaryotic; 70S prokaryotic

28

prokaryotic cytoskeleton

recently demonstrated

29

bacterial cell walls

(peptidoglycan/ murein + LPS in gram negs)

30

bacterial cell envelope

cell wall + cell membrane + capsule/slime layer