Glyoxysomes are membrane-bound organelles found in plants, particularly in the fat storage tissues of germinating seeds. Glyoxysomes contain enzymes that initiate the breakdown and conversion of fatty acids to sugars, which the emerging seedling uses as an energy and carbon source until it is able to produce its own sugar by photosynthesis. In this pathway, fatty acids are hydroylzed to acetyl-CoA for the glyoxylate bypass.
Peroxisomes are ubiquitous organelles in eukaryotes that function to rid the cell of toxic substances. They have a single membrane that separates their contents from the cytosol (the internal fluid of the cell) and that contains membrane proteins critical for various functions, such as importing proteins into the organelles and aiding in proliferation. Unlike lysosomes, which are formed in the secretory pathway, peroxisomes usually self-replicate by enlarging and then dividing, although there is some indication that new ones may be formed directly. Peroxisomes were discovered by the Belgian cytologist Christian de Duve in 1965.
A microbody is a membrane-bound cytoplasmic particle which cannot be morphologically differentiated. Microbodies are organelles specialized as containers for metabolic activity. Types include lysosomes, peroxisomes and glyoxisomes. Lysosomes contain hydroliytic enzymes involved in intracellular digestion. These enzymes are effective at pH 5, since the cytosol's pH is neutral they need to be enclosed within the vesicles. Peroxisomes contain oxidative enzymes, they break down fats, and they are used to detoxify harmful compounds in the liver (ex. alcohol). Glyoxysomes are mostly found in germinating seeds. Seedlings use glyoxysomes to convert fat into carbohydrate, until they can produce their own nutrients.
2007-01-15 17:34:37
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answer #1
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answered by The Answer Man 5
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I'm not sure what you are asking for but when I queried ask.com I got this back.
http://www.ask.com/web?q=microbody+peroxisome&qsrc=0&o=0&l=dir
2007-01-16 01:36:34
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answer #2
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answered by Deborah A 3
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