Unformatted text preview: • Some protists, such as Amoeba feed by a process of phagocytosis. The food vacuole formed merges with lysosomes for digestion. • Plant cells do not need lysosomes; breakdown products of plants are stored in their central plant vacuoles (see later) Lysosome Phagocytosis and Food Vacuole formation Peroxisomes Peroxisomes contain enzymes that transfer hydrogen in biochemical reactions to oxygen, forming hydrogen peroxide as a by-product. Since H 2 O 2 is toxic, peroxisomes also contain an enzyme, catalase, which breaks down the H 2 O 2 . Glyoxysomes Plant cells, especially in seeds, contain glyoxysomes. These cells store oils so that the germinating seed has a fuel supply. During germination, the fatty acids are converted to sugar molecules for the rapid cell respiration needed for successful germination and seedling establishment....
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- Spring '10
- Lysosome, food vacuole, rapid cell respiration, central plant vacuoles