True about genetic material of a prokaryotic cell:

Prokaryotic cells, such as bacteria, have a distinct genetic material that differs from that of eukaryotic cells. The genetic material in prokaryotic cells is present in the form of DNA and is contained within the nucleoid region of the cell. Here are the characteristics of the genetic material in prokaryotic cells:

1. Lacks histones:
Prokaryotic cells lack histones, which are proteins that help in organizing and packaging DNA in eukaryotic cells. Histones play a crucial role in the formation of chromatin and the compaction of DNA. In prokaryotes, DNA is not associated with histones and exists in a more relaxed state.

2. Not enveloped by nuclear membrane:
Unlike eukaryotic cells, prokaryotic cells do not have a true nucleus. Therefore, the genetic material of prokaryotes is not enclosed within a nuclear membrane. The DNA is present in a region called the nucleoid, which is a concentrated area within the cytoplasm where the genetic material is located.

3. Composed of a single circular DNA molecule:
The genetic material of prokaryotes is typically composed of a single circular DNA molecule. This DNA molecule is referred to as the bacterial chromosome. The circular shape of the DNA allows for efficient replication and gene expression in prokaryotes. However, some prokaryotes may also possess additional smaller circular DNA molecules called plasmids, which contain extra genes that can provide advantages such as antibiotic resistance.

Conclusion:
In conclusion, the genetic material of a prokaryotic cell lacks histones, is not enveloped by a nuclear membrane, and is composed of a single circular DNA molecule. Understanding these characteristics helps to distinguish the genetic material of prokaryotes from that of eukaryotes and provides insights into the unique features of prokaryotic cells.