Plasmids

Selectable markers are genes, such as antibiotic resistance genes, that allow researchers to identify cells that have taken up the plasmid.

Plasmids are important because they can be easily modified, replicated, and used to transfer genes. This makes them valuable tools in genetic engineering and biotechnology.

Ti plasmids are found in the bacterium Agrobacterium tumefaciens. They are used to transfer genes to plants, creating transgenic plants. They contain T-DNA and virulence genes.

The ORI is a sequence of DNA where replication begins, allowing the plasmid to replicate independently within the host cell.

A recombinant plasmid is a plasmid into which a foreign DNA fragment has been inserted. This allows for the replication and expression of the foreign gene in the host cell.

Plasmids are used as vectors to transfer and clone genes. They can be modified to carry specific genes, which are then introduced into host cells for replication and expression.

The main function of plasmids is to carry genes that can provide advantages such as antibiotic resistance. They are also used as cloning vectors in genetic engineering.

Plasmids are small, circular, extrachromosomal DNA molecules found in bacteria and some eukaryotes. They replicate independently of chromosomal DNA.