bacterial cell structure Flashcards Preview

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Flashcards in bacterial cell structure Deck (15)
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1
Q

what is a prokaryocyte

A

a cell lacking a nucleus and other membrane bound organelles
includes bacteria and cyanobacteris

2
Q

what is a spirochete bacterial cell

A

corkscrew shaped

3
Q

pleomorphic

A

bacteria of various shapes

4
Q

capsule or slime layer

A

glycocalyx

  • adherence, physical barrier
  • rigid structure= capsule
  • resists phagocytosis
  • loose structure= slime layer
5
Q

gram positive cell wall

A

thick peptidoglycan layer
contains techoic acid- negative charge, antigenic
stains purple

6
Q

gram negative cell wall

A

thin peptidoglycan layer
porins
outer membrane

7
Q

outer membrane is composed of what

A

LPS= endotoxin

8
Q

LPS structure

A
lipid A (toxic part)
core polysaccharide
O specific polysaccharide
9
Q

what is an acid fast cell wall

A

group of microbes that do not readily take up stain

10
Q

what genu of bacteria are all acid fast

A

myobacterium

11
Q

what genu of bacteria lack a cell wall

A

mycoplasma

- therefore not susceptible to antibiotics that inhibit cell wall synthesis

12
Q

what are mesosomes

A

invaginations of the cytoplasmic membrane that can form into vesicles
found in both gram positive and negative
increases surface area

13
Q

what is the periplasmic space

A

space between inner and outer membranes in gram negative cells

14
Q

what is a nucleoid

A

contains dna

bacterial chromosomes are mostly circular, some linear

15
Q

what is a plasmid

A

small extrachromosomal dna