All cells do not necessarily have a nucleus. Cells with a defined nucleus are called eukaryotic cells, while cells possessing no nucleus are called prokaryotic cells.Continue Reading
Eukaryotic cells have a defined nucleus, otherwise called the "brain" of the cell. This nucleus is surrounded by a membrane which separates the nucleus from the other clearly defined parts of the cell, called organelles. Examples of organelles are mitochondria and chloroplasts. Eukaryotic cells have the ability to become any type of tissue, based on their specific DNA.
Prokaryotic cells do not have a defined nucleus with a membrane, and typically lack the organelles of a eukaryotic cell. The DNA is contained within the cell walls in a random fashion. Due to the lack of organization, prokaryotic cells are extremely limited in size and are typically hundreds of times smaller than the average eukaryotic cell. The most common example of prokaryotic cells is bacteria.Learn more about Cells
The nucleus is the part of the cell that contains most of the genetic information found in cells. Genetic information is stored within a DNA molecule, tightly wound into a structure known as a chromosome. A tiny amount of genetic information is found in the mitochondria, outside of the nucleus.Full Answer >
Prokaryotic cells do not have a true nucleus. The word "prokaryotic" means "before nucleus." Eukaryotic cells, on the other hand, came after the prokaryotes and contain structures not present in prokaryotic cells.Full Answer >
Prokaryotic cells lack a nucleus. Bacteria and members of the domain Archaea are prokaryotes, while plants, animals, protists and fungi are eukaryotes. Prokaryotic cells lack the membrane-bound organelles found in eukaryotic cells.Full Answer >
Human cells feature a cell membrane surrounding two compartments: the cytoplasm and the nucleus of the cell. Each cell also has several organelles, or structures with specific functions.Full Answer >