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
Pulsed gel electrophoresis is used for? 
Select and explain. 
A. DNA, B. RNA, C. Ribosome, D. Protein
A: DNA
Answer: A: DNA 
Explanation: Ans. is 'a' i.e., DNA Large DNA of size larger than 15 to 20 KB can be separated with higher resolution by periodically changing the voltage direction. This is called as pulsed gel Electrophoresis