
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 …
Plasmid - National Human Genome Research Institute
2 days 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 …
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 …
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 …
What Is a Plasmid in Biology and How Does It Work?
Oct 4, 2025 · These modified plasmids are used in molecular cloning, where specific genes are inserted into the plasmid structure. Once a gene is incorporated, the recombinant plasmid can …
Plasmid: Definition, Types, Function And Significance
Jun 2, 2024 · What Is A Plasmid? Technically, plasmids are defined as usually circular, double-stranded extrachromosomal DNA. As we know, every cell has a nucleus or nuclear region 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 …
Plasmids: Properties, Types, and Functions • Microbe Online
Artificial plasmid or recombinant plasmid is the plasmid formed by recombining the bacterium’s DNA with desired DNA fragments. The process of transformation helps in introducing the DNA …
DNASU Plasmid | All About Plasmids
What is a Plasmid? Plasmids are small, double-stranded, circular pieces of DNA originally used by bacterial cells as a way to transfer traits, but are currently used in molecular biology to …