The Gram’s stain used for bacterial staining isSelect an answerAsafranin and iodineBcrystal violet and cotton blueCcotton blue and iodineDcrystal violet and iodine

The second dye used in gram staining is ___. methylene bluecrystal violetiodinesafranin

The key differential step in the Gram stain is: Group of answer choices none is considered differential the application of crystal violet the application of the iodine mordant application of safranin red dye the alcohol wash step

You are performing a Gram stain on gram-positive bacteria and you stop after the addition of the first dye. What is the appearance of the bacteria at this point?Question 13Answera.purpleb.colorlessc.redd.brown

Gram staining is based on:a) the ability of the bacterial cell wall to retain crystal violet dyeb) the lysis of bacterial cellsc) differences in bacterial shape and sized) growth of bacterial cells

Gram staining involves three steps: 1. crystal violet (purple) staining, 2. decolorization, 3. counterstaining (red). If you look under a microscope after the first step, you will see that:Group of answer choicesonly gram negative bacteria are purpleonly gram positive bacteria are purpleboth gram positive and negative bacteria are purpleneither gram positive and negative bacteria are purple