Question
The cell wall depicted below is most likely to belong to which of the following organisms?
| A. |
Rhinosporidium seeberi
|
| B. |
Mycobacterium tuberculosis
|
| C. |
Mycoplasma pneumoniae
|
| D. |
Aspergillus fumigatus
|
Show Answer
|
Correct Answer » D
Explanation
|
|
- The diagram clearly shows:
- Outer layer: Mannoproteins
- Middle layer: β-glucans
- Inner layer: Chitin
- This layered structure is typical of fungal cell walls
Aspergillus fumigatus
- A fungus (mold)
- Cell wall composition:
- Chitin (structural rigidity)
- β-glucans (framework)
- Mannoproteins (outer surface)
- The image exactly represents this fungal cell wall architecture
Explanation of Other Options
A. Rhinosporidium seeberi
- Has sporangia containing endospores, not this layered wall diagram
B. Mycobacterium tuberculosis
- Cell wall contains:
- Mycolic acids
- Arabinogalactan
- No chitin or glucan → not fungal
C. Mycoplasma pneumoniae
- No cell wall
- Has only a plasma membrane with sterols
