Organelles of the Plant Cell By Valerie Gutierrez

Organelles of the Plant Cell By: Valerie Gutierrez

Plasma Membrane § Consists of a phospholipid bilayer § Controls molecules movement in and out of the cell § Cell to cell signaling § Cell adhesion

Cell Wall § Composed primarily of cellulose § Provides structural support Structure of Cellulose Thomas A. NEWTON

Mitochondria § Powerhouse of the cell § Main site of ATP production § Consists of an inner membrane and an outer membrane § Cristae - foldings in the inner membrane § Matrix – central space § Intermembrane space – space between the membranes § Contain their own DNA

Chloroplasts § Most characteristic organelles § Thylakoids – interconnected membrane-limited sacs § Contain chlorophyll (green pigment) § Contain their own DNA § Bounded by two bilayer membranes § Carry out photosynthesis

Vacuoles § Can occupy up to 80% of cell § Stores water, ions, and nutrients § Degrades macromolecules § Functions in cell elongation during growth § Maintains turgor in cell

Endoplasmic Reticulum § Smooth ER § Lacks ribosomes § Synthesizes fatty acids and phospholipids Smooth Endoplasmic Reticulum No ribosomes § Rough ER § Do not lack ribosomes § Synthesizes, processes, and sorts secreted proteins

Golgi Complex § Series of flattened membrane sacs § Cis and trans side § Processes, sorts, and ships proteins to where they need to go § “Post Office” Trans Cis

Nucleus § Store cell’s DNA § Coordinates cell’s activities Ø Nucleolus- manufactures ribosomes Ø Nuclear Envelope- double membrane that encloses contents of nucleus

References Kimball, John W. (2000, November). Kimball’s Biology Pages. Retrieved September 23, 2003, from http: //users. rcn. com/jkimball. ma. ultranet/Biology. Pages/P/Plant. Cell. html Carpi, Anthony. (1998 -1999). The Cell. Retrieved September 23, 2003, from http: //web. jjay. cuny. edu/~acarpi/NSC/13 -cells. htm Plant Cell Organelles. (1994 -2003). Retrieved September 23, 2003, from http: //www. cellsalive. com/cells/plntcell. htm Plant Cell Anatomy. (2001 -2003). Retrieved September 23, 2003, from http: //www. enchantedlearning. com/subjects/plants/cell/ Lodish, Berk, Matsudaira, Kaiser, Krieger, Scott, Zipursky, Darnell. (2003). Molecular Cell Biology. New York: W. H. Freeman and Company.