Question

which of the following pairs is mismatched?
alcohol/acetone - decolorizer
safranin - primary dye
crystal violet - primary dye
iodine - mordant
question 12 (1 point)
which of the following bacterial genera is commonly associated with gram positive?
staphylococcus
pseudomonas
salmonella
escherichia

Explanation:

First Question (Mismatched Pair)

• In Gram staining: Alcohol/acetone is the decolorizer (correct). Crystal violet is the primary dye (correct). Iodine is the mordant (correct). Safranin is the counterstain (not primary dye; primary dye is crystal violet). So "Safranin - primary dye" is mismatched.

• Staphylococcus is a Gram - positive bacterial genus. Pseudomonas, Salmonella, and Escherichia are Gram - negative.

Answer:

B. Safranin - primary dye

Second Question (Gram - Positive Bacterial Genus)