Cell Structure and Function. Procaryotic Cells No membrane bound organelles Typically unicellular.

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Presentation transcript:

Cell Structure and Function

Procaryotic Cells No membrane bound organelles Typically unicellular

Eukayotic Cells Have membrane bound organelles Typically multicellular

Nucleus

Ribosomes Composed of two subunits consisting of rRNA and proteins Attached and unattached ribosomes Polysomes

Rough ER Proteins produced are exported from cell All proteins enter lumen to be modified

Smooth ER Testes cells smooth ER produces steroids Liver cells smooth ER detoxifies alcohol All cells smooth ER produces vesicles for transportation of proteins to the golgi bodies

Golgi Bodies Modifies, packages, stores and distributes proteins Proteins from rough ER will be shipped to cell membrane for exocytosis Produces lysosomes Cis and trans face

Vesicles and Vacuoles Lysosomes contain hydrolytic enzymes WBC have many golgi bodies Vacuoles carry larger substances ex. bacteria

Mitochondria Site of cellular respiration (production of ATP) Cells using exocytosis and endocytosis require a great deal of ATP

Plasma Membrane Lipids pass easily through and polar compounds require proteins Proteins in cell membrane determine cell function

Plasomodesmata

Intercellular Links

Surface Area to Volume Cells require a efficient removal of wastes and in take of nutrients This limits the size of the cell