After Staining the nucleus in onion peel cells appear as?
A)Blue spot
B)Black spot
C)Green spot
D)None of these
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the answer is black spot
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(A) Blue spot.
After staining, the nucleus in the onion peel cell appears as a blue spot.
The stain used for the onion experiments is iodine.
Iodine usually makes the cell more transparent inside an onion cell. Onion layers contain simple sugars some of which are contained in the form of starch and is seen as a blue spot.
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