In certain bacteria, small circular DNA found outside the genomic DNA is called

Solution:

In bacteria, the main genetic material is a single, circular chromosome located in the nucleoid region. In addition to this genomic DNA, many bacteria contain small, circular, extra-chromosomal DNA molecules called plasmids. Plasmids replicate independently of the main chromosome and often carry genes that confer advantageous traits, such as antibiotic resistance. A nucleoid is the region where the bacterial chromosome is located. A polysome is a complex of mRNA and multiple ribosomes involved in protein synthesis. A nucleolus is a structure found in the nucleus of eukaryotic cells, involved in ribosome synthesis, and is absent in prokaryotes like bacteria.