Question

A bacteriophage is

• A. A virus attacking a bacterium
• B. A bacterium attacking a virus
• C. A stage in the life-cycle of bacterium
• D. A virus attacking another virus

Answer 1

Answer: (A)

A virus attacking a bacterium

Viruses are the microorganisms that cannot multiply by their own so invade a living host for survival. So they invade organisms like humans, plants and bacteria. The virus that invades bacteria is called the bacteriophage. They consist of a head that is filled with the DNA encapsulated in a protein coat and a tail part. Thus, the correct answer is option A.