EVERYDAY SCIENCE

Detailed explanation-1: -Cytoplasm or protoplasm of a bacterial cell is a gel like matrix composed of 80% water, enzymes, nutrients, wastes, gases, inorganic ions, and many low molecular weight compounds and cell structures such as ribosomes, chromosomes (nucleoid), and plasmids.

Detailed explanation-2: -The DNA of most bacteria is contained in a single circular molecule, called the bacterial chromosome. The chromosome, along with several proteins and RNA molecules, forms an irregularly shaped structure called the nucleoid. This sits in the cytoplasm of the bacterial cell.

Detailed explanation-3: -The DNA of bacterial cells is found loose in the cytoplasm. It is called chromosomal DNA and is not contained within a nucleus. Bacteria also have small, closed-circles of DNA called plasmids present in their cytoplasm.

Detailed explanation-4: -In many bacteria the DNA is present as a single circular chromosome, although some bacteria may contain two chromosomes, and in some cases the DNA is linear rather than circular. A variable number of smaller, usually circular (though sometimes linear) DNA molecules, called plasmids, can carry auxiliary information.

Detailed explanation-5: -Free Chromosomal DNA – Bacterial cells have DNA free in the cytoplasm. It is single-stranded, unlike DNA in a nucleus which is double-stranded. Plasmid DNA – Some bacteria have small circular loops of DNA in the cytoplasm called plasmids.