Question

Why iodine used to stain the onion peel ?​

Answer 1

Answer:

Because it provides colour to the onion peel so that it is clearly visible under a microscope. It gives it a dark and visible color without changing its chemical properties.

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Answer 2

Iodine uses in staining system:

• Iodine is a aspect of the staining system known as gram staining, which is used in microbiology.

• Iodine completes the entrance to the dye via holes in the cell wall.
• At room temperature iodine is almost black solid and has the appearance of a lucent non-metallic crystal.

Used to stain onion peel:

• Onion bulb stores starch particles in cytoplasm cells.
• When iodine granules binds with starch particles they form a bluish black color.
• In this process, the onion cells can be clearly identified by staining the onion cells with iodine.
• It can be also confirms the truth that onion shops reserve meals fabric in the form of starch.

Thus, Iodine used to stain the onion peel.

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