What is prokaryotic cell? Differentiate between prokaryotic cell & eukaryotic cell.

A prokaryotic cell is a simple, primitive cell type that lacks a membrane-bound nucleus and other membrane-enclosed organelles. The genetic material in prokaryotes exists as a single circular DNA molecule located in a region called the nucleoid, which is not separated from the cytoplasm by any membrane. Bacteria and blue-green algae (cyanobacteria) are examples of prokaryotic organisms, representing some of the earliest and most abundant life forms on Earth.

The fundamental differences between prokaryotic and eukaryotic cells are substantial. Eukaryotic cells, found in plants, animals, fungi, and protists, possess a true nucleus enclosed by a nuclear membrane, while prokaryotes lack this compartmentalization. Eukaryotes contain complex membrane-bound organelles such as mitochondria, endoplasmic reticulum, Golgi apparatus, and lysosomes, whereas prokaryotes have none of these specialized structures. Prokaryotic cells are generally smaller (1-10 micrometers) compared to eukaryotic cells (10-100 micrometers) and have a simpler internal organization. Ribosomes, though present in both cell types, are smaller (70S) in prokaryotes compared to eukaryotes (80S). Cell division also differs significantly—prokaryotes reproduce through simple binary fission, while eukaryotes undergo complex mitosis or meiosis. These differences reflect different levels of cellular complexity and evolutionary advancement.