Final answer:
Some bacteria have short DNA segments identical to RNA replicase.
Step-by-step explanation:
Some bacteria have short DNA segments identical to RNA replicase.
RNA Replication in Bacteria
DNA replication has been well studied in bacteria primarily because of the small size of the genome and the mutants that are available. E. coli has 4.6 million base pairs (Mbp) in a single circular chromosome and all of it is replicated in approximately 42 minutes, starting from a single origin of replication and proceeding around the circle bidirectionally (i.e., in both directions). This means that approximately 1000 nucleotides are added per second. Some E.Coli bacteriophages like f2, MS2, R₁7 and Qb have RNA genomes and these RNA are replicated forming identical daughter RNA by the enzyme RNA-directed-RNA-polymerase or RNA replicase.