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  • Prokaryotic Cells: Definition, Structure & Key Features
    A prokaryotic cell is a simple, single-celled organism that lacks a membrane-bound nucleus and other membrane-bound organelles.

    Here's a breakdown of key characteristics:

    * No nucleus: Genetic material (DNA) is located in a region called the nucleoid, but it's not enclosed within a membrane.

    * No membrane-bound organelles: Prokaryotes lack complex internal compartments like mitochondria, Golgi apparatus, endoplasmic reticulum, etc.

    * Smaller size: Prokaryotic cells are generally much smaller than eukaryotic cells.

    * Simpler structure: They have a relatively simple structure compared to eukaryotic cells.

    * Ribosomes: They have ribosomes, but these are smaller than those found in eukaryotic cells.

    * Cell wall: Most prokaryotes have a rigid cell wall that provides structural support.

    * Plasma membrane: They have a cell membrane that encloses the cytoplasm.

    * Flagella and pili: Some prokaryotes have flagella for movement and pili for attachment.

    Examples of prokaryotes: Bacteria and archaea.

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