What allows bacteria to stain positively with gram stain?

Correct answer: D. The bacteria's thick peptidoglycan cell walls

  • A. The bacteria is anaerobic
  • B. The bacterial sample was pretreated with 3% ethanol
  • C. The bacteria's periplasmic space
  • D. The bacteria's thick peptidoglycan cell walls

Explanation

Based on the explanations provided, the correct answer to the question is option D) The bacteria's thick peptidoglycan cell walls. The presence of thick peptidoglycan in the cell wall allows bacteria to stain positively with the Gram stain, appearing purple.

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