Gel Electrophoresis Review

Based on these results whose blood was found in the blood stain at the crime scene?

• Bob
• Sue
• John
• Lisa

Which man is the father of this baby?

• Father 1
• Father 2
• Father 3
• None of them

What is the purpose of gel electrophoresis?

• helps cut DNA
• count the genes in DNA
• separates DNA based on size
• allows for an exact replicated organism

Why do the fragments of DNA in gel electrophoresis travel away from the negative electrode?

• DNA is negatively charged so attracted to the positive end of the unit
• DNA is positively charged to attracted to the negative end of the unit
• the agarose gel in negatively charged
• the agarose gel is positively charged

In gel electrophoresis, the largest DNA fragment will appear

• closest to the starting wells
• farthest from the starting wells
• three quarters away from the starting wells
• it depends on how many fragments there are

Which is the primary purpose of using restriction enzymes in gel electrophoresis?

• It allows the strands of DNA to be cut into various lengths for testing
• It restricts the number of base pairs that can be tested in a sample
• It makes the testing simpler by moving the strands into the gel faster
• It charges the DNA strands

What is the function of the gel in Gel Electrophoresis?

• extract DNA from the liquid

• filter the DNA as it moves through the system

• buffer the DNA so it keeps moving

• charge the DNA so it will move to the opposite side of the system

Which DNA fragment bands move faster and farther in a gel electrophoresis? 

• there is no way to tell 
• the largest ones
• the smallest ones
• none of these

Which suspect is linked to the crime scene by this DNA analysis

• Suspect A

• Suspect C

• Suspect D

• Suspect B

Shannon does not know who her father is.  There are three possibilities:  Jack, Daniel and Bill.  Who is the father?

• Jack
• Daniel
• Bill