Q558
The mordant used in Gram staining is
A.
Safranine
B.
Crystal violet
C.
Iodine
AnswerD.
Ethanol
Answer: Option C
Solution
Answer: Option C
Solution:
The mordant used in Gram staining is Iodine.The mordant is Gram's Iodine. This binds to the crystal violet making a large complex that adheres to the cell membrane.
Gram's Iodine is allowed to sit for 30 seconds then the decolourizer, 95% ethanol is added.