Biology · Microbiology
Find the INCORRECT statement regarding the Gram staining technique of bacteria.
- 1Gram-positive bacteria have a thick peptidoglycan layer, so they are unable to retain crystal violet.✓
- 2Gram-negative bacteria have a thin peptidoglycan layer and do not retain crystal violet after decolorization.
- 3Gram's iodine acts as a mordant to form the crystal-violet-iodine complex.
- 4Gram-negative bacteria appear red/pink under a microscope after counterstaining with safranin.
Correct answer
Gram-positive bacteria have a thick peptidoglycan layer, so they are unable to retain crystal violet.
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