Plasmid - Wikipedia
Plasmid Diagram of a bacterium showing chromosomal DNA and plasmids (Not to scale) A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal …
What Is a Plasmid? Definition, Function, and Uses
4 days ago · A plasmid is a small, circular piece of DNA that exists inside bacteria separately from the bacterium’s main chromosome. Plasmids range from about 2,000 to over 1 million DNA base pairs in …
Plasmids – Definition, Structure, Types, and Uses
Jan 21, 2026 · What Is a Plasmid? A plasmid is a small, circular (or sometimes linear) DNA molecule that exists independently of the main chromosomal DNA within a cell. Most plasmids are double …
Plasmids 101: What is a plasmid? - Addgene
Jan 14, 2014 · What is a plasmid? At their most basic level, plasmids are small circular pieces of DNA that replicate independently from the host's chromosomal DNA. They are mainly found in bacteria, …
Plasmid - National Human Genome Research Institute
1 day ago · A plasmid is a small circular DNA molecule found in bacteria and some other microscopic organisms. Plasmids are physically separate from chromosomal DNA and replicate independently.
Plasmid | DNA replication, genetic engineering, cloning | Britannica
Mar 17, 2026 · Plasmid, in microbiology, an extrachromosomal genetic element that occurs in many bacterial strains. Plasmids are circular deoxyribonucleic acid (DNA) molecules that replicate …
What is a Plasmid? | Ask A Biologist
Apr 12, 2010 · A plasmid is an independent, circular, self-replicating DNA molecule that carries only a few genes. The number of plasmids in a cell generally remains constant from generation to generation.
What is a plasmid? | IDT - Integrated DNA Technologies
Dec 4, 2023 · A plasmid is a small circular piece of double stranded DNA that can replicate independently from a host’s chromosomal DNA. A plasmid is distinct from a cell’s chromosomal DNA …
Plasmids: Structure, Types, Replication, and Applications
Oct 12, 2025 · The term plasmid refers to a small, circular, extrachromosomal double-stranded DNA molecule that exists naturally in many bacteria, and in some archaea and eukaryotic organisms.
plasmid / plasmids | Learn Science at Scitable - Nature
A plasmid is a small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA. Plasmids naturally exist in bacterial cells, and they also occur in some eukaryotes.