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Question

Which is the most commonly used stain for epidermal cells?

A
Malachite green
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B
Iodine
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C
Basic fuchsin
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D
Crystal violet
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Solution

The correct option is B Iodine
Iodine was initially used to stain epidermal cells as it precipitates the proteins of the protoplasm and stains them a light brown colour, the nucleus in a more intense colour, and nucleoli even darker, as well as cell walls which help to distinguish the different parts of cells. Therefore, the correct answer is option B.

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