◾◾◾True chromosomes are formed,, by the the combination of DNA and histone protein ......◾◾◾.In prokaryotes only DNA is present,,, histone proteins are absent.... ◾◾◾hence it is considered that there is No true chromosomes in bacteria or prokaryotes...

Chromosomes in Prokaryotes

Chromosomes are the genetic material of an organism, carrying the instructions for the development, functioning, and reproduction of the organism. They are composed of DNA, which is tightly packed and organized with proteins called histones. However, prokaryotes, which include bacteria and archaea, do not possess true chromosomes like eukaryotes. There are several reasons for the absence of true chromosomes in prokaryotes:

Absence of Nucleus
The nucleus is a membrane-bound organelle present in eukaryotic cells that houses the DNA. It provides a separate compartment for DNA replication, transcription, and translation processes. In prokaryotes, there is no nucleus, and the genetic material is present in the cytoplasm. The lack of a nucleus in prokaryotes leads to the absence of true chromosomes.

Absence of Nucleolus
The nucleolus is a distinct region within the nucleus of eukaryotic cells. It is involved in the synthesis and assembly of ribosomes, which are responsible for protein synthesis. Prokaryotes do not have a nucleolus, as they lack a nucleus. The absence of the nucleolus further contributes to the absence of true chromosomes in prokaryotes.

Absence of Histones
Histones are proteins that play a crucial role in DNA packaging and organization in eukaryotes. They help in condensing the DNA into a compact and manageable structure, forming the characteristic chromatin fibers. Prokaryotes do not possess histones, and their DNA is not organized in a similar manner as eukaryotic chromosomes. Instead, prokaryotic DNA is usually present as a single circular molecule or multiple small circular molecules called plasmids.

Summary
In summary, prokaryotes lack true chromosomes due to the absence of a nucleus, nucleolus, and histones. Their genetic material is present in the cytoplasm, and the DNA is not packaged and organized in the same way as eukaryotic chromosomes. The absence of these components in prokaryotes is a fundamental difference between prokaryotic and eukaryotic cells.