It is in eukariyotes. Mitochondria is an organelle
Eukaryotes have a nucleus and membrane-bound organelles, such as mitochondria and endoplasmic reticulum, which prokaryotes lack. Eukaryotes also have linear chromosomes, while prokaryotes have circular chromosomes. Additionally, eukaryotes often have multicellular organization, which is less common in prokaryotes.
Eukaryotes are characterized by having a nucleus in their cells. Prokaryotic cells do not have this organelle, and their genetic material is located in the cell membrane instead.
Prokaryotes have no distinct nucleus.
Membrane-enclosed Organelles
Eukaryotes have membrane-bound organelles such as the nucleus, endoplasmic reticulum, Golgi apparatus, and mitochondria, which prokaryotes lack. Eukaryotes also have a cytoskeleton for structural support and transport, which is absent in prokaryotes. Additionally, eukaryotes have a more complex and organized internal structure compared to prokaryotes.
Cells with a nucleus are known as eukaryotes. Cells without nulcei are called prokaryotes.
Prokaryotes lack a nucleus.Eukaryotes have a nucleus.
Prokaryotes: * single-cellular * do not have membrane-bound organelles (such as mitochondria or chloroplasts) * transcription and translation of DNA can occur simultaneously due to the fact that there is no nuclear membrane Eukaryotes: * can be multi-cellular * contain membrane-bound organelles
One key difference between prokaryotes and eukaryotes is that eukaryotic cells contain a nucleus enclosed within a membrane, while prokaryotic cells do not have a nucleus. Eukaryotic cells also generally have membrane-bound organelles, such as mitochondria and endoplasmic reticulum, which are absent in prokaryotic cells.
There are two basic types of cells, prokaryotes and eukaryotes. Eukaryotes differ from prokaryotes in a few ways, but the biggest difference is that eukaryotes have a nucleus and prokaryotes don't.
Prokaryotes lack a nucleus and membrane-bound organelles, while eukaryotes have both a nucleus and membrane-bound organelles. Prokaryotes are usually unicellular and simpler in structure, while eukaryotes can be unicellular or multicellular and have more complex cellular organization.
Since you asked about the main organelle, singular, I will have to say....The membrane bound nucleus that eukaryotes have and prokaryotes do not.