1.  Mitochodria =Mitochondria are the cell's power producers. They convert energy into forms that are usable by the cell. Located in the cytoplasm, they are the sites of cellular respiration which ultimately generates fuel for the cell's activities.
2.   Peroxisomes contain enzymes that work by transferring hydrogen from a substrate to oxygen, thereby producing hydrogen peroxide as a by-product. Hydrogen peroxide is toxic to the cell, but peroxisomes also contain an enzyme that is capable of converting hydrogen peroxide to water.
3.  The vacuole maintains fluids, removes wastes, stores ingested food, and provides and maintains cellular structure
4.  CYTOSKLELETON
   protection against normal wear and tear
   They cytockeleton is more like a scaffolding for the cell. Although protection against wear and tear is one of its functions, it is certainly not limited to this function alone.   
    5.The function of the Golgi apparatus is to modify, sort, and package proteins and other materials from the Cellular endoplasmic reticulum for storage within the Cell and, very much more often, for the 'secretion' of these mostly proteinaceous Bio-substances to the Exterior of the Cell. 
   
   
   

   6.Centrosomes coordinate the building and breaking of microtubules in the cell. Plays a role in cell division

   
   
   7.The secretary vesicle is a type of transporter organelle that is used to deliver particles within the cell or from the cell to outside of the cell. (Secretion-hence the name secretory vesicles)
   
   

   8. The rough ER appears rough due to the presence of ribosomes on the membrane surface. Smooth and Rough ER also have different functions. The functions of RER are providing an internal structural skeleton to support the cell's shape, as storage of the synthesised materials and minerals, such as calcium in myocytes, forming an internal network through which materials can be transported; and providing a large surface area on which chemical reactions can occur.
   
   

   9.The rough endoplasmic reticulum is a series of interconnected, collapsed sac like structures with ribosomes embedded on its surface.
   The main function of the rough endoplasmic reticulum is to manufacture proteins, from the cells genetic material.
   
   

   10.nucleoles

   it contains all the dna of the cell. this is used as instructions to create the building blocks of the cell(proteins). it is often refered to as the brain of the cell as it controlls what goes on. it is also used for cellular reproduction

    

   11.c. nucleus stores DNA - DNA is trancribed to make RNA - RNA is used to make proteins - Proteins include enzymes - enzymes control the rate of reactions - metabolism is the sum of all the chemical reactions in an organism or cell