After the primary stain has been added but before the decolorizer has been used,gram-positive organisms are stained __________ and gram-negative organisms are stained __________.

Question

Quizplus · Accepted Answer

After the primary stain (crystal violet) has been added but before the decolorizer (usually alcohol or acetone) has been used in the Gram staining process, both gram-positive and gram-negative organisms are stained purple. This is because the primary stain colors all cells.

After the Primary Stain Has Been Added but Before the Decolorizer