Cell wall (In depth)

Question 1

What substance help form bacteria cell walls?

Answer 1

Peptidoglycan (p.g.)

Question 2

What is peptidoglycan made of?

Answer 2

• Protein: Peptide bonds
• Carbs: NAM and NAG

Question 3

Gram-positive cell wall

Answer 3

• thick layer of p.g.
• teichoic acids (t.a.): wall t.a. and lipo t.a.

Question 4

Gram-negative cell wall

Answer 4

• thin p.g. layer
• has outer membrane
• outer membrane contains: porins and Lipopolysaccharides (LPS)
• LPS contains: O polysaccharides and Lipid A (endotoxin)