Molecule Movement in Gel Electrophoresis

The video tutorial explains how to interpret a gel by analyzing the movement of dyes in a practice gel with six wells. It covers the relationship between dye movement, charge, and molecule size. The tutorial also demonstrates how to identify components in dye mixtures by comparing their movement distances. The conclusion emphasizes the correlation between molecule size and movement speed in the gel.

What is the purpose of using dyes in the gel experiment?

• To increase the speed of the experiment

• To change the color of the gel

• To visualize the movement of molecules

• To identify the charge of molecules

Which electrode do positively charged dyes move towards?

• Both electrodes

• Positive electrode

• Negative electrode

• Neither electrode

What is the charge of a molecule that moves towards the positive electrode?

• Positive

• Neutral

• Variable

• Negative

What can be inferred about a molecule that moves slowly in the gel?

• It is a small molecule

• It is a fast-moving molecule

• It is a large molecule

• It has no charge

Which dye in the experiment is identified as the smallest positive molecule?

• Cherry

• Orange

• Grape

• Banana

Which dye moved the least in the gel, indicating it is the largest molecule?

• Grape

• Banana

• Cherry

• Orange

What does the presence of orange and cherry in well E indicate?

• E is a single dye

• E is a mixture of dyes

• E contains only orange

• E contains only cherry

Which dyes are present in the F mixture?

• Banana, Grape, and Cherry

• Banana, Orange, and Cherry

• Grape, Orange, and Cherry

• Banana, Grape, and Orange

What is the relationship between molecule size and distance traveled in the gel?

• Smaller molecules travel further

• Larger molecules travel further

• All molecules travel the same distance

• Size does not affect distance

What is the main factor that allows small molecules to move quickly through the gel?

• Their charge

• Their size

• The color of the dye

• The type of gel used