Cells160-page17

Cells160-page17 - Cells may have few to many mitochondria,...

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Cell - 17 Other Organelles Mitochondria Function of Mitochondria: Mitochondria contain the enzymes needed to obtain energy stored in carbohydrate and other fuel molecules and use that energy to form ATP, the molecule needed to do cell work. These processes are a part of aerobic cell respiration, specifically known as the Krebs Cycle and Electron Transport. We will devote some time to the discussion of these vital metabolic processes of cell respiration in our next unit! Structure of Mitochondria The mitochondrion has a double membrane system; the outer membrane is smooth; the inner membrane is deeply folded and convoluted, forming cristae. The double membrane of the mitochondrion forms two compartments filled with fluid: The intercompartment space is between the outer membrane and the cristae, and the central mitochondrial matrix is formed by the inner cristae membrane. This arrangement facilitates the functions of the mitochondria.
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Unformatted text preview: Cells may have few to many mitochondria, depending on the energy requirements of cell. Mitochondria contain their own DNA and ribosomes and can self-replicate. Evidence indicates that they originated as endosymbiont bacteria. Plastids Plastids are found in the cells of plants. Animal cells do not contain plastids. In general, a plastid is a membrane-bounded organelle that stores something. (There are actually a number of structures identified as "storing something, such as vesicle, and as we shall see, vacuoles.) There are three common plastids: chloroplast, amyloplast and chromoplast. Chromoplasts Chromoplast means pigmented plastid. Store the plant pigments (notably the yellow, orange and red carotenoids) that are not water soluble, and not involved in photosynthesis Chromoplasts are abundant in orange, golden and scarlet pigmented regions of plants....
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This note was uploaded on 12/29/2011 for the course BIO 151 taught by Professor Edwards during the Spring '10 term at SUNY Stony Brook.

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