Why would there b more transmission by about 15% using the colorimeter at 100% ethanol concentration?

Question

The experiment conducted used beetroot to see what varying concentrations of alcohol would do to the cell membrane. I used discs of 8mm and went up by 20% each time with the ethanol concentration. Also how does this effect the proteins within the cell membrane and also what part do enzymes play in the breaking down of the cell membrane?

Answer 1

Classical biology experiment.

Of course, ethanol disrupts the membranes of the plant that holds the pigment inside the cell (the pigment is actually held inside vacuoles inside the plant cell). And hence the pigment can leak out. Ethanol can denature proteins.

I don't quite understand your experiment, because the classical one involves DECREASING transmission with INCREASING ethanol, i.e. the solution becomes darker with more ethanol, as more pigment leaks out of the cell.