bacterial cell structure

Question 1

what is a prokaryocyte

Answer 1

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

Question 2

what is a spirochete bacterial cell

Answer 2

corkscrew shaped

Question 3

pleomorphic

Answer 3

bacteria of various shapes

Question 4

capsule or slime layer

Answer 4

glycocalyx

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

Question 5

gram positive cell wall

Answer 5

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

Question 6

gram negative cell wall

Answer 6

thin peptidoglycan layer
porins
outer membrane

Question 7

outer membrane is composed of what

Answer 7

LPS= endotoxin

Question 8

LPS structure

Answer 8

lipid A (toxic part)
core polysaccharide
O specific polysaccharide

Question 9

what is an acid fast cell wall

Answer 9

group of microbes that do not readily take up stain

Question 10

what genu of bacteria are all acid fast

Answer 10

myobacterium

Question 11

what genu of bacteria lack a cell wall

Answer 11

mycoplasma

- therefore not susceptible to antibiotics that inhibit cell wall synthesis

Question 12

what are mesosomes

Answer 12

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

Question 13

what is the periplasmic space

Answer 13

space between inner and outer membranes in gram negative cells

Question 14

what is a nucleoid

Answer 14

contains dna

bacterial chromosomes are mostly circular, some linear

Question 15

what is a plasmid

Answer 15

small extrachromosomal dna