tailed bacteriophages fall within group i of baltimore groups.
tailed bacteriophages fall within group i of baltimore groups.
tailed bacteriophages fall within which of baltimore groups?
group i
the caudovirales are an order of viruses also known as the tailed bacteriophages ("cauda" is latin for "tail"). under the baltimore classification scheme, the "caudovirales" are group i viruses as they have double stranded dna (dsdna) genomes, which can be anywhere from 18,000 base pairs to 500,000 base pairs in length. the virus particles have a distinct shape; each virion has an icosahedral head that contains the viral genome, and is attached to a flexible tail by a connector protein. the order encompasses a wide range of viruses, many containing genes of similar nucleotide sequence and function. however, some tailed bacteriophage genomes can vary quite significantly in nucleotide sequence, even among the same genus. due to their characteristic structure and possession of potentially homologous genes, it is believed these bacteriophages possess a common origin.
caudovirales
viruses infecting bacteria, called bacteriophages, are a common and diverse group of viruses and are thought to be the most abundant form of biological entity in aquatic environments, because their hosts, bacteria, are typically the numerically dominant cellular life in the sea;– generally, there are about 1 million to 10 million viruses in each ml of seawater, or about ten times more double-stranded dna viruses than there are cellular organisms, although estimates of viral abundance in seawater can vary over a wide range. tailed bacteriophages appear to dominate marine ecosystems in number and diversity of organisms, and bacteriophages belonging to the families corticoviridae, inoviridae and microviridae are also known to infect diverse marine bacteria.
marine microorganism