F. Differences In The Structure Of Gram + / -

Question 0

Gram - structure, from inside outward

Answer 0

Cell membrane
Periplasmic space

PG layer (20%)
Periplasmic space

Outer membrane (80%)
Contains lipoproteins, lipopolysaccharides, porins

Question 1

Gram + structure, from inside outward

Answer 1

Cell membrane

Lipotechoic acid - contribute negative charge

Periplasmic space

PG layer (90%)

Teichoic acid - contribute negative charge

Question 2

Gram - :

Lipoproteins

Answer 2

Anchor the outer membrane to the PG layer

Question 3

Gram - :

Porins

Answer 3

Proteins that allow passage through outer membrane

Question 4

Gram - :

Lipopolysaccharides contains what qualities?

Answer 4

1. Charge
2. Antigens
3. Receptors
4. Endotoxins

Question 5

4 genera that produce endotoxins

Answer 5

1. Escherichia
2. Salmonella
3. Shigella
   ^Fecal material^
4. Neiserria