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, often circular DNA molecule found in bacteria and other cells.
Plasmid - Definition, Types and Functions | Biology Dictionary
Apr 7, 2019 · 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 independently of …
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 …
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 …
Plasmids- Definition, Properties, Structure, Types, Functions ...
Mar 13, 2022 · The term Plasmid was coined by Joshua Lederberg in 1952. Plasmids are important as genetic tools, which are used to introduce, manipulate or delete certain genes from the host cell.
Plasmid | DNA replication, genetic engineering, cloning ...
Dec 23, 2025 · Plasmid, in microbiology, an extrachromosomal genetic element that occurs in many bacterial strains. Plasmids are circular deoxyribonucleic acid (DNA) molecules that replicate …
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.
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 fundamental genetic …
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 units …