Gram -ve bacteria stain during gram staining____________?
Correct answer: B. Red color
- A. Blue color
- B. Red color
- C. Green
- D. Colorless
Explanation
Gram-negative bacteria lose the crystal violet-iodine complex during alcohol decolourisation because their thin peptidoglycan layer cannot retain it. They then take up the counterstain safranin and appear pink to red.
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