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: Microbiology
Bacteriophages are mostly needed for 
Select and explain. 
A. Bacterial identification, B. Epidemiologically, C. As antibacterial agent, D. Conversion propey in bacteria
A: Bacterial identification
Answer: A: Bacterial identification 
Explanation: Ans. is 'a' i.e., Bacterial identification "The specificity of bacteriophage-bacterium interaction is made use of in identification and typing of bacteria". Bacteriophage (phage) . Bacteriophages are viruses that infect bacteria. . Phages play an impoant role in the transmission of genetic information between bacteria by the process of transduction. . The presence of phage genome integrated with bacterial chromosome confer bacteria ceain propeies by a process known as phage conversion. . Phages have been used as cloning vectors in genetic manipulation.