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NEET UG BIOLOGY MCQ: CELL-THE UNIT OF LIFE
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Arrange the following steps in a correct sequence as per Gram’s staining technique
I. Treatment with 0.5% iodine solution
II. Washing with water
III. Treatment with absolute alcohol/acetone
IV. Staining with weak alkaline solution of crystal violet
The correct sequence is
I. Treatment with 0.5% iodine solution
II. Washing with water
III. Treatment with absolute alcohol/acetone
IV. Staining with weak alkaline solution of crystal violet
The correct sequence is
View answer and explanation
Correct option: B
IVIIIIII
Option B (IV → I → II → III) is correct because the correct sequence for Gram's staining is crystal violet, iodine, water wash, and then alcohol/acetone.
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