Gel Electrophoresis

What is the primary purpose of gel electrophoresis in the laboratory?

• To synthesize new proteins

• To separate and analyze macromolecules

• To measure the pH of solutions

• To amplify DNA samples

Which component of DNA allows it to be separated using an electric current in gel electrophoresis?

• Its positive charge

• Its sugar phosphate backbone

• Its double helix structure

• Its nucleotide sequence

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

• They encounter less resistance

• They are less dense

• They are more attracted to the negative side

• They have a higher charge

How can gel electrophoresis be used in forensic science?

• To analyze fingerprints

• To identify the blood type of a suspect

• To match DNA samples from a crime scene with a suspect

• To determine the age of a suspect

What evidence can gel electrophoresis provide in a criminal investigation?

• A match between DNA samples from a suspect and a crime scene

• The exact time a crime was committed

• The location of a suspect during the crime

• The motive behind the crime