Gram Stain of Prokaryote Bacteria Staphylococcus epidermidis


Prokaryotic Cell
Parts, Functions & Diagrams of Prokaryotes
 


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Single-celled prokaryotes are microbes that include bacteria and their bacteria-like cousins Archaea. Prokaryotic cells are much simpler than the more evolutionarily advanced 
eukaryotic cell

Whereas eukaryotic cells have many different functional compartments, divided by membranes, prokaryotes only have one membrane (the plasma membrane) enclosing all of the cell’s internal contents. 
Article Summary: Prokaryotes are simple, single-celled, yet remarkably successful organisms. Here's an overview of the structures and functions of prokaryotic cells.
Prokaryotic Cell Structures, Functions & Diagrams
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Prokaryotic Cell, Mariana Ruiz
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Internal Structures of Prokaryotic Cells
  • Plasma Membrane: The cell membrane is a double-layer of phospholipids with associated proteins and other molecules. It is essentially the “bag” that holds all of the intracellular material and regulates the movement of materials into and out of the cell.

  • Cytoplasm: This is the gel-like fluid that the cell is filled with, inside the plasma membrane; liquid with all of the cellular organelles suspended within.

Labeled Illustration of Eukaryotic and Prokaryotic Biological Cells
Continued ... 
External Cell Structures
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​Page last updated: 8/2015
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CLASS NOTES 
from the free STEM 
education site 
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If a eukaryotic cell is analogous to a big house with many different rooms, a prokaryotic cell is like a one-room, studio apartment.

FREE Printable 
Prokaryotic Cell Diagram
to help you remember prokaryotes parts and pieces.
Labeled Drawing of Prokaryotic Cell
  • Cytoskeleton: It's only recently been discovered that rod-shaped bacteria and Archaea possess cytoskeletal proteins that function in a similar way to the cytoskeleton of eukaryotic cells. This scaffolding provides structural support to the cell and plays a role in cell division.

  • Ribosomes: All cells, both prokaryotic and eukaryotic, have multiple ribosomes within. Ribosomes are the tiny protein-making machines of the cell.
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Fluoresced Eukaryotic Cells, US Gov, NIH
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