This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
DNA fragments formed by the action of Restriction endonucleases, are separated by - 
Select and explain. 
A. Gel electrophoresis, B. Agarose gel electrophoresis, C. Paper chromatography, D. High pressure liquid chromatography
B: Agarose gel electrophoresis
Answer: B: Agarose gel electrophoresis 
Explanation: DNA is cut into large fragments, using restriction enzymes. These fragments are then separated by gel electrophoresis (either agarose or polyacrylamide gel electrophoresis).