This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Biology Techniques, Subject name: Biochemistry
[{'content': 'Most commonly used vector for DNA cloning - \nSelect and explain. \nA. Plasmid, B. Virus, C. Cosmid, D. Phage', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e.. Plasmid o A cloning vector is a carrier DNA molecule to which human DNA fragment is attached. Normally, foreign DNA fragments cannot self-replicate within host cell. Therefore, they are joined to a vector DNA, that can replicate within host cell.o The five major types of cloning vectors used are -PlasmidsViral vectors/BacteriophagesCosmidsBacterial Artificial Chromosomes (BACs)Yeast artificial chromosomes (YACs)o Most commonly used vectors are plasmids.", 'role': 'assistant'}]