Lecture 6 Surface of the microbial cell Flashcards
Lysosomes are a defence mechanism in animals. What microbe does it target?
a) Archaea
b) Fungi
c) Viruses
d) Bacteria
a) archae –> resistant to lysozomes
b) Bacteria → their cell is made of NAG & NAM, lysosomes cleave / break down cell wall.
lysozomes are present in out tears and secretion
Which one of the following is NOT a component of the outer wax layer found in Acid Fast bacteria?
1. Lipomannan
2. mycolic acid
3. arabinglycan
5. lipid A
- Lipid A –> unique to gram negative bacteria
Acid Fast bacteria are a unique sub-catogory under gram positive,
You want to use an antibiotic that targets the cell wall to treat an infection. Which group is the most resistant?
1. Acid-fast bacteria
2. Mycoplasma
3. Gram-negative bacteria
4. Gram-positive
5. Fugi
Select all that apply
- Acid-fast bacteria –> would be hard to kill due to thick outer wax coat
**2. Mycoplasma –> is an exception in that it lacks a cell wall, so there would be nothing to target
**3. Gram-negative –> would be the 2nd hardest to kill due outer membrane protecting the cell wall - Gram Positive –> most easiest to kill cuz cell wall is fully exposed
**5. Fungi –> not applicable since their cell wall is NOT made of peptidoglycan **
Know the details for the informatino of MYCOPLASM
Which would be the outermost layer of a gram positive bacterium?
1. Cytoplasm
2. Cell Wall
3. Outer membrane
4. Cytoplasmic membrane
2) Cell Wall
cytoplasm, cytoplasmic membrane, cell wall
Order:
Which would be the outermost layer of a gram negative bacterium?
1.Cell Wall
2.Cytoplasm
3.Myocilic acid
4.Outer membrane
4) Outer membrane
Oder
cytoplasm, cytoplasmic membrane, cell wall, outer membrane
gram - doesn’t have a myocilic acid layer (wax)
Which would be the outermost layer of a acid-fast bacterium?
1. Cell Wall
2. Outer membrane
3. myocilic acid
4. none of the above
3) Myocilic acid
