EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -Rather they have circular chromosomal DNA that is their genetic material. The circular chromosome is the actual genome of prokaryotic organisms which is present in circular form. They also have extra-chromosomal circular DNA (called a plasmid) that protects them from the attack of the phage virus.

Detailed explanation-3: -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-4: -Definition. 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.