Methylene blue stain on potato
tube A - 100 degrees and gave a light blue colour
tube b - 38-42 degrees and gave a deep blue colour
tube c - room temperature and colourless
tube d had ethanol with the methylene blue on the potato and gave a light blue colour
tube e had lead nitrate and gave a blue colour.....
please explain to me what happneed to the cell membranes of each and to why they gave those colours