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A Prokaryotic Cell

Explore the fascinating world of prokaryotic cells, the oldest and most common unicellular organisms, primarily bacteria. This guide matches cell structures with their functions, detailing components like the ribosome for protein synthesis, the protective cell wall, and the plasma membrane that maintains homeostasis. Learn about the nucleoid region containing genetic information, circular plasmids, and flagella for movement, all within a gelatinous cytoplasm. Understand how these components work together to support life in diverse environments.

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A Prokaryotic Cell

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  1. of A Prokaryotic Cell

  2. Directions: Match the structure with the correct function. ___Most unicellular organisms, such as bacteria, that do not have membrane bound organelles. ___Site for protein synthesis. ___Supports and protects the cell ___Maintains homeostasis by its selective permeability. ___Coaled up DNA into a circular loop. ___The region of the cell that contains genetic information. ___Gelatinous-like fluid mostly composed of water. ___Long projections that move with a whip-like motion. a) Prokaryotic b) Ribosome c) Cell Wall d) Plasma Membrane e) Plasmid f) Nucleoid g) Flagella h) Cytoplasm

  3. Prokaryotic Cells • oldest single-celled organisms • most common cell • found almost everywhere • no true nucleus • bacteria

  4. Cell Wall • rigid and inflexible wall • thick, tough, fibrous barrier • very porous • Supports and protects the cell

  5. Plasma Membrane • flexible boundary • lipid bilayer • maintains homeostasis • selectively permeable • allows nutrients, ions, and other substances across the membrane through protein channels

  6. Cytoplasm • clear, gelatinous fluid • contains all the necessary parts of a prokaryotic cell • composed mostly of water

  7. Ribosomes • floats freely in the cytoplasm • receive and translate genetic information • site for protein synthesis Actual structure of a ribosome

  8. Nucleoid • region of DNA • DNA is condensed into a circular loop  PLASMID • How is this different from • a nucleus?

  9. long projections • produce whip-like motions • major means of locomotion/movement for cell Flagella

  10. Site of protein synthesis Contained in the nucleoid, condensed into circular loop called PLASMID Gel-like fluid in cell, mostly composed of water Major means of locomotion Supports and protects the cell Selectively permeable to maintain homeostasis

  11. Quick Review ___ Most unicellular organisms, such as bacteria, that do not have membrane bound organelles. PROKARYOTE ___ Site for protein synthesis. RIBOSOME ___ Maintains homeostasis by its selective permeability. PLASMA MEMBRANE ___ Supports and protects the cell CELL WALL ___ Coaled up DNA into a circular loop. PLASMID ___ Long projections that move with a whip-like motion. FLAGELLA ___The region of the cell that contains genetic information. NUCLEIOD ___Gelatinous-like fluid mostly composed of water. CYTOPLASM

  12. Eukaryotic Cell Animal Cell Plant Cell http://www.youtube.com/watch?v=LMVQ-INMSVw&feature=related • http://www.youtube.com/watch?v=PXbv95P3uhI

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