LIFE SCIENCE

Detailed explanation-1: -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.

Detailed explanation-2: -Bacteria have a single circular chromosome that is located in the cytoplasm in a structure called the nucleoid. Bacteria also contain smaller circular DNA molecules called plasmids.

Detailed explanation-3: -Plasmid DNA is a part of extrachromosomal DNA that is separated from the genomic DNA. It typically occurs inside the prokaryotic cells and is circular in nature.

Detailed explanation-4: -The plasmid vectors most widely used for gene cloning are small circular molecules of double-stranded DNA derived from larger plasmids that occur naturally in bacterial cells.