Gel Electrophoresis Concepts and Safety

The video tutorial covers the use of gel electrophoresis in lab 1.2 to separate dye mixtures. It explains the setup of agarose gel, the movement of samples based on size and charge, and the importance of handling gels carefully. Safety precautions for using gel electrophoresis equipment are also discussed.

What is the primary purpose of using gel electrophoresis in lab 1.2?

• To mix different dye solutions

• To separate and visualize DNA fragments

• To create new dye mixtures

• To measure the pH of solutions

Which component is NOT loaded into the agarose gel during the experiment?

• Orange G

• Bromophenol Blue

• Xylene Cyanole

• Sodium Chloride

Where are the wells of the agarose gel positioned in the gel chamber?

• At the bottom by the positive electrode

• At the sides of the gel

• At the top by the negative electrode

• In the center of the gel

What determines the distance a molecule travels through the gel?

• The color of the molecule

• The size and charge of the molecule

• The temperature of the gel

• The time the gel is run

Why do heavier molecules have difficulty moving through the gel matrix?

• They are attracted to the negative electrode

• They are repelled by the gel matrix

• They dissolve in the gel

• They have a harder time moving through the porous gel

What characteristic of a molecule allows it to travel further in the gel?

• A neutral charge

• A larger size

• A more negative charge

• A more positive charge

Why should students avoid touching the agarose gels?

• They are very delicate

• They are toxic

• They are expensive

• They are sticky

What is a key safety concern when using gel electrophoresis equipment?

• Using gloves to handle the gel

• Keeping the cover on the gel box while running

• Turning off the lights in the lab

• Ensuring the gel is dry before use

What happens if the cover of a gel electrophoresis box is removed while running?

• The gel will dry out

• The power will automatically cut off

• The gel will melt

• The samples will mix

Who should you consult to learn more about the gel electrophoresis chambers provided?

• The lab manual

• Your specific site staff

• The internet

• Your classmates