DNA Fingerprinting and Gel Electrophoresis Quiz

What is the first step in creating a DNA fingerprint using gel electrophoresis?

• Running an electrical current through the gel

• Using restriction enzymes to cut DNA

• Comparing DNA samples from suspects

• Using a polymerase chain reaction to make copies

Why is it important to make multiple copies of DNA fragments before running them through gel electrophoresis?

• To ensure the DNA moves faster through the gel

• To alter the charge of the DNA

• To make the fragments easier to measure

• To change the size of the DNA fragments

How does the size of a DNA fragment affect its movement through the gel in electrophoresis?

• Size does not affect movement

• Smaller fragments move faster

• Smaller fragments move slower

• Larger fragments move faster

In a crime scene investigation, how is a suspect's DNA compared to the DNA found at the scene?

• By matching the color of the DNA samples

• By comparing the distance moved by DNA fragments in the gel

• By checking the weight of the DNA samples

• By analyzing the smell of the DNA samples

How can gel electrophoresis be used in paternity testing?

• By determining the color of the DNA

• By matching the DNA fragments of the child with the mother

• By comparing the child's DNA fragments with potential fathers

• By measuring the weight of the DNA samples