LIFE SCIENCE

Detailed explanation-1: -Bacteria are cheap, easy to grow, clonal, multiply quickly, are relatively easy to transform, and can be stored at-80 °C almost indefinitely. Once a gene is isolated it can be stored inside the bacteria, providing an unlimited supply for research.

Detailed explanation-2: -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. Often, the genes carried in plasmids provide bacteria with genetic advantages, such as antibiotic resistance.

Detailed explanation-3: -Structure and Functions of Bacterial Plasmid These plasmids are small, circular, double-stranded DNA structures naturally found in all bacterial cells. These plasmids are much smaller than the primary chromosomal DNA. The size of plasmids vary from 1 to 1000 kbp, and they usually contain 5 to 100 genes.