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.

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.

4 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.

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.

2025年1月19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.

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

2025年1月18日 · A well-known example is the F plasmid (fertility plasmid) in Escherichia coli, which carries genes necessary for pilus formation and DNA transfer. These plasmids often harbor genes that provide adaptive advantages, such as antibiotic resistance or metabolic capabilities, which can be spread rapidly through bacterial populations.