Final answer:
The experiment examines the effect of different alcohols on red beet cell membranes, with the independent variable being the type of alcohol and the dependent variable the amount of dye released.
Step-by-step explanation:
When testing the effect of different alcohols on the cell membrane of red beet cells, the correct experimental variables would be: Independent variable: Type of alcohol, Dependent variable: Amount of dye released. The independent variable is the factor that is changed or manipulated during an experiment, while the dependent variable is what is measured or observed. In this case, the type of alcohol being tested (e.g., methanol, ethanol, propanol, etc.) is what is varied to observe its effect on the beet cell membranes, with the outcome being measured in terms of the amount of red dye that is released due to membrane damage.
Damage to the cell membrane can be considered an indicator of the membrane's integrity and can be measured by the leakage of substances such as pigments or dyes. Therefore, this experiment would observe how different alcohols affect membrane permeability, leading to the release of red dye from red beet cells.