What are the characteristics of prokaryotic?

Answer 1

Cells that lack a membrane-bound nucleus are called prokaryotes (from the Greek meaning before nuclei). These cells have few internal structures that are distinguishable under a microscope. Cells in the monera kingdom such as bacteria and cyanobacteria (also known as blue-green algae) are prokaryotes.

Prokaryotic cells differ significantly from eukaryotic cells. They don't have a membrane-bound nucleus and instead of having chromosomal DNA, their genetic information is in a circular loop called a plasmid. Bacterial cells are very small, roughly the size of an animal mitochondrion (about 1-2µm in diameter and 10 µm long). Prokaryotic cells feature three major shapes: rod shaped, spherical, and spiral. Instead of going through elaborate replication processes like eukaryotes, bacterial cells divide by binary fission.

Diagram of a prokaryotic cell. Notice the internal organelles are not easily distinguishable.

Bacteria perform many important functions on earth. They serve as decomposers, agents of fermentation, and play an important role in our own digestive system. Also, bacteria are involved in many nutrient cycles such as the nitrogen cycle, which restores nitrate into the soil for plants. Unlike eukaryotic cells that depend on oxygen for their metabolism, prokaryotic cells enjoy a diverse array of metabolic functions. For example, some bacteria use sulfur instead of oxygen in their metabolism.They are usually very small in size as compared to eukaryotic celles

Answer 2

Prokaryotic cells lack a membrane-bound nucleus. Some of their characteristics include: the lack of organelles, cell walls are composed of peptidoglycan and they contain only one circular strand of DNA .

Answer 3

Prokaryotic cells lack a true nucleus and membrane-bound organelles. Their genetic material is typically a single circular chromosome located in the nucleoid region of the cell. They are generally smaller and simpler in structure compared to eukaryotic cells.