Question: What is the role of electrophoresis in the analysis of biological samples?

Options:

1. To separate ions based on their charge and size
2. To measure the absorbance of light
3. To quantify the concentration of gases
4. To determine the boiling point of compounds

Correct Answer: To separate ions based on their charge and size

Solution:

Electrophoresis separates biological molecules, such as proteins and nucleic acids, based on their charge and size.