Prokaryotic cell

Prokaryotic cells are a type of cell that lack a nucleus and other organelles due to the absence of a nuclear membrane. They are one of the simplest forms of life and are typically much smaller than eukaryotic cells. Prokaryotic cells are found in bacteria and archaea, two of the three domains of life.

Characteristics

Prokaryotic cells are generally smaller and simpler than eukaryotic cells. They lack a nucleus, instead containing a single, circular DNA molecule located in a region called the nucleoid. They also lack other membrane-bound organelles, such as mitochondria or chloroplasts. However, they do contain ribosomes, which are not enclosed within a membrane.

Structure

The structure of a prokaryotic cell consists of a cell wall, a plasma membrane, and a cytoplasm. The cell wall provides structural support and protection, while the plasma membrane controls the movement of substances in and out of the cell. The cytoplasm contains the cell's DNA and ribosomes.

Reproduction

Prokaryotic cells reproduce through a process called binary fission, which is a form of asexual reproduction. During binary fission, the DNA molecule is replicated and the cell divides into two identical cells.

Classification

Prokaryotic cells are classified into two domains: Bacteria and Archaea. Bacteria are the most diverse and well-known group of prokaryotes, while Archaea are less well-known and are often found in extreme environments.

See also

• Eukaryotic cell
• Cell biology
• Microbiology

Prokaryotic cell Resources
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