The features found in gram-positive and gram-negative bacteria are as follows: The cell wall of gram-positive bacteria is composed of thick layers peptidoglycan while the cell wall of gram-negative bacteria is composed of thin layers of peptidoglycan.
A gram-positive bacteria is a bacteria that stains dark blue or violet after gram staining, due to large quantities of peptidoglycan in the cell wall.
On the other hand, gram-negative bacteria is a bacteria that retains the gram stain due to the low amount of peptidoglycan in the cell wall.
Therefore, the major structural difference between gram-positive and gram-negative bacteria is as follows: the cell wall of gram-positive bacteria is composed of thick layers peptidoglycan while the cell wall of gram-negative bacteria is composed of thin layers of peptidoglycan.
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