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The Fundamental Unit of Life — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceThe Fundamental Unit of Life1 Mark
MCQ
Which is the most commonly used stain for epidermal cells?
  • A
    Malachite green.
  • B
    Iodine.
  • C
    Basic fuchsin.
  • D
    Crystal violet.
✓

Answer

  1. Iodine.

Explanation:

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.

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