Plasmid
Videos
A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently. They are most commonly found as small circular, dou
Electron micrograph of a DNA fiber bundle, presumably of a single bacterial chromosome loop
Electron micrograph of a bacterial DNA plasmid (chromosome fragment)
Insulin
Archaea
Videos
Archaea is a domain of organisms. Traditionally, Archaea included only its prokaryotic members, but has since been found to be paraphyletic, as eukaryotes are known to have evolved from archaea. Even
Plasmid
…from chromosomal DNA and can replicate independently. They are most commonly found as small circular, double-stranded DNA molecules in bacteria and archaea; however plasmids are sometimes present in eukaryotic organisms as well. Plasmids often carry useful genes, such as those involved in antibiotic…
Archaea were discovered in volcanic hot springs. Pictured here is Grand Prismatic Spring of Yellowstone National Park.
The ARMAN are a group of archaea discovered in acid mine drainage in the early 2000s.
Sulfolobus infected with the DNA virus STSV1. Bar is 1 micrometer.
Archaea that grow in the hot water of the Morning Glory Hot Spring in Yellowstone National Park produce a bright colour