Question

How can prokaryotes live without a nucleus?

Answer 1

Hint: The nucleus is an organelle that is membrane-bound and comprises eukaryotic organisms of genetic material (DNA). The nucleus helps to protect the integrity of the cell by facilitating transcription and replication processes. The nucleus makes up about a tenth of the entire cell volume and it is the largest organelle within the cell.

Complete answer:
Prokaryotes are single-cellular species without organelles or other structures attached to the inner membrane. Organisms whose cells lack a nucleus and other organelles are prokaryotes. Prokaryotes are classified into two separate groups: the archaea and the bacteria. They may not have a nucleus, but they typically have a single chromosome instead: a piece of circular, double-stranded DNA found in the nucleoid region of the cell. In an area of the cell called the nucleoid zone, DNA is a single loop. The DNA loop is repeated to duplicate the cell, and as part of binary fission, one copy travels to either side of the cell. In prokaryotic cells, a single circular piece of DNA carries genetic material. The cell membrane is bound to DNA and is in close contact with the cytoplasm. There is no enclosing membrane, because there is no actual nucleus, but merely a concentration of DNA called a nucleoid.

Therefore, prokaryotes can live without a nucleus.

Note:
Prokaryotes have a more primitive prokaryotic cytoskeleton than that of eukaryotes. In addition to actin and tubulin homologues, one of the most essential cytoskeletal proteins of bacteria is the helically organized building-block of the flagellum, flagellin. Intracellular structures that can be used as primitive organelles often include at least some prokaryotes.