Nontypical Cell walls

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8 Terms

1
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Two groups that cannot be classified in the gram-positive or negative cell wall

  1. Mycobacteria

  2. Nocardia

2
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Why are mycobacterium and nocardia highly resistant to certain chemicals and dye?

Due to the Lipids in their cell wall, they are thick and waxy.

3
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What type of stain is required to diagnose TB and Leprosy?

Acid-fast

4
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Composition of archaea cell wall

Some: Entirely polysaccharides

Some: Pure protein

5
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What do archaea cell wall lack that is present in bacteria?

true peptidoglycan structure

6
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What are the defining features of mycoplasmas?

lack a cell wall and are ultra-small

7
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How does mycoplasma’s structure benefit them? (what is present in their membrane?)

cytoplasmic membrane is stabilized by sterols and is resistant to lysis

8
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Most important medical species of mycoplasma

Mycoplasma pneumoniae