The difference between gram positive and negative bacteria lies in their_______________?
Correct answer: A. cell wall
- A. cell wall
- B. cell membrane
- C. Nuclear material
- D. Mesosomes
Explanation
The major structural difference is in the cell wall: Gram-positive bacteria have a thick peptidoglycan layer, whereas Gram-negative bacteria have a thin layer plus an outer membrane. Their nuclear material and cell membrane are not the basis of Gram staining.
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