Plasmid - Wikipedia
A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently. They are most commonly found as small circular, double-stranded DNA molecules in bacteria; however, plasmids are sometimes present in archaea and eukaryotic organisms.
Plasmid - Definition, Types and Functions - Biology Dictionary
2019年4月7日 · 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 chromosomal DNA.
Plasmid - National Human Genome Research Institute
3 天之前 · 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. They typically have a small number of genes — notably, some associated with antibiotic resistance — and can be passed from one cell to another.
Plasmid | DNA replication, genetic engineering, cloning | Britannica
2024年10月17日 · Plasmid, in microbiology, an extrachromosomal genetic element that occurs in many bacterial strains. Plasmids are circular deoxyribonucleic acid (DNA) molecules that replicate independently of the bacterial chromosome.
Plasmids 101: What is a plasmid? - Addgene
2014年1月14日 · A plasmid is a small circular piece of DNA found in bacterial cells, and someone new to plasmids may need some extra guidance to understand the specific components that make up a plasmid and why each is important.
Plasmids- Definition, Properties, Structure, Types, Functions, …
2022年3月13日 · 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. Properties of Plasmids
What is a Plasmid? - Ask A Biologist
2010年4月12日 · 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.
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.
7.4A: Introduction to Plasmids - Biology LibreTexts
2022年12月24日 · A plasmid is a DNA molecule that is separate from, and can replicate independently of the chromosomal DNA. They are double-stranded and, in many cases, circular. Plasmids usually occur naturally in bacteria, but are sometimes found in archaea, and even in eukaryotic organisms (e.g., the 2-micrometre ring in Saccharomyces cerevisiae ).
Plasmid: Definition, Types, Function And Significance - Science ABC
2024年6月2日 · 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 contains all the genetic material of the cell.