Plasmid - Wikipedia
A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently.
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 …
Plasmid | DNA replication, genetic engineering, cloning | Britannica
Oct 14, 2025 · Plasmid, in microbiology, an extrachromosomal genetic element that occurs in many bacterial strains. Plasmids are circular deoxyribonucleic acid (DNA) molecules that …
What is Plasmid DNA? Definition & Structure Explained – QIAGEN
A plasmid is a closed circular molecule of double-stranded DNA that range in size from 1 to >200 kb. Plasmids are found in various bacterial species, where they behave as additional genetic …
What Is a Plasmid in Biology? Its Function and Uses
Aug 23, 2025 · A plasmid is a small, circular, extra-chromosomal DNA molecule found within the cells of many microorganisms. Unlike the main chromosomal DNA, which carries the …
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 …
Unraveling Plasmids: A Comprehensive Guide - CD Genomics
Plasmids are small, circular DNA molecules. They exist separately from the main DNA in cells and can copy themselves. They are predominantly found in bacteria and archaea, but can also be …
What is a plasmid? | IDT - Integrated DNA Technologies
Dec 4, 2023 · Both genomic DNA and plasmid DNA are found in living organisms. Genomic DNA are chromosomal DNA in living organisms that contain genetic information, while plasmid DNA …
Plasmids: Properties, Types, and Functions • Microbe Online
Plasmids are extra-chromosomal genetic elements that replicate independently. They are small, circular (some are linear), double-stranded DNA molecules (mostly) that exist in bacterial cells …
7.4A: Introduction to Plasmids - Biology LibreTexts
Plasmids provide a mechanism for horizontal gene transfer within a population of microbes and typically provide a selective advantage under a given environmental state.