How phage’s external structure is composed ?
Bacteriophages are viruses that infect bacteria and archaea and multiply within them. Their genomes can contain anywhere from four to hundreds of genes. Following the injection of their DNA into the bacterium's cytoplasm, phages proliferate within it. Bacteriophages are one of the biosphere's most common and diverse organisms. Bacteriophages are bacteria-killing viruses that can be found almost anywhere. Bacteriophages are thought to number in the billions, outnumbering all other organisms on the world, including bacteria.
A phage particle consists of a single nucleic acid (DNA or RNA) and a protein capsid that shields the genetic material. The majority of phage have a protein tail that allows them to recognize a receptor on the host bacterium's surface.
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