Multiple choice

What are the polymers of ribitol or glycerol phosphates covalently linked to the peptidoglycan of gram positive organisms?

  1. Diaminopimelic acid

  2. Lipopolysaccharide

  3. Teichoic acids

  4. N-acetylmuramic acid

  5. Lipid A
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Teichoic acids are bacterial polysaccharides of glycerol phosphate or ribitol phosphate linked to muramic acid of peptidoglycan via phosphodiester bonds. Teichoic acids are found within the cell wall of gram positive bacteria, such as species in the genera Staphylococcus, Streptococcus, Bacillus, Clostridium, Corynebacterium and Listeria ,and appear to extend to the surface of the peptidoglycan layer. Teichoic acids are not found in gram- negative bacteria.

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