
Plasmid - National Human Genome Research Institute
3 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 - Wikipedia
A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently.
Plasmid - Definition, Types and Functions | Biology Dictionary
Nov 15, 2016 · A plasmid is a small, circular piece of DNA that is different than the chromosomal DNA, which is all the genetic material found in an organism’s chromosomes. It replicates …
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 …
Plasmid | DNA replication, genetic engineering, cloning | Britannica
Oct 14, 2025 · Plasmids are circular deoxyribonucleic acid (DNA) molecules that replicate independently of the bacterial chromosome. They are not essential for the bacterium but may …
What Is a Plasmid in Biology and How Does It Work?
Oct 4, 2025 · Plasmids are small, double-stranded, circular DNA molecules primarily found in bacteria and archaea, and occasionally in some eukaryotic organisms like yeast. They are …
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 …
Plasmid: Definition, Types, Function And Significance - Science ABC
Jun 2, 2024 · Plasmids are small, circular pieces of DNA that are found in both prokaryotic and eukaryotic cells. These pieces of DNA are important because they can confer special abilities …
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? Three key components - miniPCR bio
Independent from the bacterial chromosome, plasmids replicate autonomously and exist in multiple copies inside the host cell. Plasmids often contain genes that provide beneficial traits …