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Functions of Organelles

 
Nucleus:  A membrane-bound region of eukaryotic cells.  Contains the genetic material - DNA.  
Ribosome:  An organelle that is present in both eurkyaotic and prokaryotic cells, the ribosome is composed of RNA (ribonucleic acid) and proteins.  The ribosome functions in protein assembly through the process of translation.  
Endoplasmic Reticulum (ER):  A eukaryotic organelle that is composed of interconnected tubules, vesicles and cisternae. The Endoplasmic Reticulum is responsible for packaging of proteins, and works closely with the ribosomes, golgi apparatus and RNA.  There are two types of endoplasmic reticulum:  Smooth and Rough.  
   Rough ER:  Plays a role in protein synthesis and packaging.  The ER appears "rough" because Ribosomes are attached to the ER membrane.  
              Smooth ER:  Mainly for storage of ions and steroids.  Smooth because it is not studded with Ribosomes.  
Mitochondrion:  The "powerhouse" of the cell, the mitochondrion produces energy in the form of ATP via the electron transport chain.  The mitochondrion is enclosed by its own membrane
Lysosome:  An organelle that contains digestive enzymes, the lysosome "digests" cellular trash such as old organelles, viruses, bacteria and food particles.  
Golgi Apparatus:  An organelle responsible for shipment of substances inside the cell.   
Peroxisome (Microbody):  An eukaryotic organelle responsible for metabolism of fatty acids, toxic peroxides, and other substances.    
Cilium / Flagellum:  Both cilium and flagellum are organelles responsible for cell locomotion.  Cilia are tail-like cellular projections, while flagellum are projections that move like a whip to move the cell.  
Cytoskeleton:  The cytoskeleton is the scaffolding found within the cytoplasm.  The cytoskeleton is responsible for maintaining cell structure. 

 

 

 
 
 
 

 

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