Discussion
Which of the following is true about the cell wall of gram-positive bacteria?
Answer: D
Correct answer: All of the above
All three are true of the gram-positive wall: it is built of many layers of peptidoglycan, making it much thicker than the gram-negative one, and it contains teichoic acids threaded through it. Those layers are what trap the crystal violet-iodine complex during Gram staining.
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