What is a Bacteriophage?

Bacteriophage:

1. It is a virus that infects bacteria.
2. They are usually double-stranded DNA viruses.
3. The nucleic acid is protected by a protein coat called the capsid, which consists of tiny subunits called capsomeres.
4. These capsomeres have a helical or polyhedral geometric arrangement.
5. For example - Phage T4