Gel Electrophoresis: A Key Technique in Molecular Biology

What is the primary purpose of gel electrophoresis in molecular biology?

• To separate DNA fragments based on size and charge

• To synthesize new DNA strands

• To amplify DNA sequences

• To sequence DNA

Which material is commonly used to make the gel in gel electrophoresis?

• Agarose

• Polyvinyl chloride

• Silicone

• Polyethylene

What factor does NOT affect electrophoretic mobility?

• Color of the molecule

• Size of the molecule

• Net charge of the molecule

• Shape of the molecule

In gel electrophoresis, why do smaller DNA fragments travel faster through the gel?

• They encounter less resistance in the gel matrix

• They have a higher charge

• They are more attracted to the negative electrode

• They are less dense

What is a common application of gel electrophoresis in clinical diagnostics?

• Identifying abnormalities in serum protein patterns

• Measuring blood pressure

• Detecting viral infections

• Determining blood type