Tomato cells are stained with methylene blue because it binds to nucleic acids, allowing for visualization of the cell's nucleus and DNA content under a microscope. Iodine solution, on the other hand, is typically used to stain starch grains due to its ability to form a complex with starch molecules, rather than DNA.
The nucleus stained with iodine appears dark purple or black.
The reaction between potassium iodide and potassium bromide in the presence of methylene blue will result in the formation of elemental iodine (I2) which imparts a purple color to the solution. Initially, the reaction mixture will be colorless, but as iodine forms, the solution will turn purple.
Starches turn blue-black when stained with iodine (which usually stains things a reddish-brown or amber color).Iodine turns blue black when starch is present
iodine
Yes epithelial cells are stained
If the iodine on/in the potato turns dark blue/purple/black, it means the iodine has reacted to the starch in the potato and has changed color.
Iodine stains starch blue. You will be able to see the plastids where the starch is stored in the cytoplasm.
BlackAns2:It is very unlikely that a ripe banana will have enough starch to turn iodine black. When iodine turns black, it is a positive test for the presence of starch.
Yes, other cellular structures such as human epithelial cells can be stained intensely by iodine. However, when examining amyloplasts, you must come to that conclusion yourself. Are any cellular structures other than amyloplasts stained intensely by iodine? What can you conclude about the location of starch in storage cells of potato? Good luck and ChaCha on!
The colour for a plant cell's starch grains is typically blue or black when stained with iodine solution. This is due to the formation of a complex between iodine and starch, which results in the characteristic colour change.
Plant cells are typically stained with dyes like iodine to highlight structures like nuclei and starch granules. Animal cells can be stained with dyes like hematoxylin and eosin to distinguish different cell components like nuclei and cytoplasm. These stains help researchers visualize and study the cells under a microscope.