00:10
00:09
00:08
00:07
00:06
00:05
00:04
00:03
00:02
00:01
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
plasmid plas·mid (plāz'mĭd)
n.
A circular, double-stranded unit of DNA that replicates within a cell independently of the chromosomal DNA and is most often found in bacteria; it is used in recombinant DNA research to transfer genes between cells. Also called extrachromosomal element.
| plasmid (plāz'mĭd) Pronunciation Key
A small, circular unit of DNA that replicates within a cell independently of the chromosomal DNA and is most often found in bacteria. Certain plasmids can insert themselves into chromosomes in places where there is a common sequence of nucleotides. Plasmids contain a few genes, which usually code for proteins, especially enzymes, some of which confer resistance to antibiotics. Plasmids are used in recombinant DNA research, especially to transform bacterial cells. See more at transformation. |
A circular bacterial DNA, sometimes used as a vector for gene insertion or genetic engineering. Plasmids are often the site of genes that code for resistance to antibiotics.