A circular, double-stranded unit of DNA that replicates within a cell independently of the chromosomal DNA. Plasmids are most often found in bacteria and are used in recombinant DNA research to transfer genes between cells. American Heritage® Dictionary of the English Language, Fifth Edition. Co...
Plasmids are ___() A.A type of virus B.Extrachromosomal DNA found in bacteria C.Double stranded D.the tool to express any protein in living cells 查看答案
The plasmid is an additional double-stranded DNA found in eukaryotes and prokaryotes. It carries additional genes that are advantageous to the host such as antibiotic resistance genes.What are Plasmids? Plasmids are a genetic structure that is found in some prokaryotic cells such as bacteria and so...
We found that exposure to TCS led to a 4- to 128-fold increase in TCS MICs (Fig. 1e and supplementary Table S4). Increased TCS resistance was also observed using confocal laser scanning microscopy where TRMs had higher proportion of living cells compared to the parental strain at 8 mg/...
even if additionalrrnoperons could be found on extrachromosomal replicons3,4,5,6,7,8. Theoretical and experimental studies suggest that a population consisting of individuals with solerrnoperon only on the plasmid are unstable9and a second copy of essential genes cannot be maintained stably on p...
A plasmid is usually a circular (sometime linear), double strandad DNA, that can replicate itself autonomously. These are found in the cytoplasm of the bacterial cell, plasmids normally remain separated from the chromosome, but sometimes may integrate in
dConfocal laser scanning microscopy images of a representative evolved d10-2 and parental Kp85 clones in the absence or presence of 8 mg/L triclosan and stained with LIVE/DEAD staining (n = 2 biological independent samples). Alive and dead cells are shown in green and red colors, ...
What is the role of CRISPR in bacterial cells? Why can plasmids replicate independently of the bacterial chromosome? What is the biological significance of operons? Are plasmids made of single-stranded DNA? What is the importance of DNA polymerase?
19,20 Longer histories of host-plasmid coexistence are often found in strictly intracellular bacteria. The potentially longest described case is found in Buchnera species, primary endosymbionts of aphids, which seem to be coevolving with their plasmids for up to 70 My.21 Around 25 My years of ...
Several tetracycline-resistant colonies are found. (c) Identification of pVJH2 In accordance with the process of alkaline lysis, an instant preparation of the plasmid DNA is performed on the thus-obtained tetracycline-resistant colonies, as described by T. Maniatis et al. The aforedescribed ...