TLS Online TPP Program

#Question id: 40411


Arrange the correct sequence of color changes observed in a Gram-negative bacterium during the Gram staining process at each step:

  1. After Crystal Violet

  2. After Safranin

  3. After Alcohol decolorization

  4. After Iodine treatment

#Applied Microbiology
  1. Purple → Purple → Pink → Pink
  2.  Purple → Purple → Colorless → Pink
  3. Pink → Purple → Colorless → Purple
  4.  Purple → Pink → Colorless → Purple