Question

short note on t4 bacteriophages​

Answer 1

T4 is a relatively large virus, at approximately 90 nm wide and 200 nm long (most viruses range from 25 to 200 nm in length). The DNA genome is held in an icosahedral head, also known as a capsid. The T4's tail is hollow so that it can pass its nucleic acid into the cell it is infecting after attachment.

Answer 2

Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome, and may have relatively simple or elaborate structures. Their genomes may encode as few as four genes and as many as hundreds of genes. Bacteriophages are ubiquitous viruses, found wherever bacteria exist. It is estimated there are more than 1031bacteriophages on the planet, more than every other organism on Earth, including bacteria, combined.Bacteriophages occur abundantly in the biosphere, with different genomes, and lifestyles. Phages are classified by the International Committee on Taxonomy of Viruses (ICTV) according to morphology and nucleic acid.