Correct option (d) is the genetic part in addition to DNA in microorganisms
Explanation:
Plasmids are sma]I, self-replicating, extrachromosomal, non-essential genetic elements in bacteria. Each plastic has a ring of circular, supercoiled, double-stranded DNA. They cany genes for replication and for one or more cellular non-essential functions. These are also called minichromosomes or dispensable autonomous elements.
