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Cell structure
13-18
6
Biology
Undergraduate 1
09/26/2006

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Term
Lysosomes:
Definition
“garbage disposals” they break down worn out organelles, captured bacteria
etc. Contain many digestive enzymes in a very acidic environment.
Term
Peroxisomes
Definition
Membrane bound sacs that contain enzymes. The enzymes break down
toxins and make oxygen use by the cell more efficient. Catalase enzyme converts
hydrogen peroxide into water and oxygen.
Term
Centrioles (centrosomes):
Definition
Involved in cell division (establish the poles of the cell). Not
found in plants
Term
Chloroplasts:
Definition
Only in plants and green algae. House the chemical reactions of
photosynthesis and the necessary pigment, chlorophyll.
Term
Vacuole
Definition
common in plants. Large centrally located sac for water storage.
Term
Cell Wall:
Definition
only plants and prokaryotes. Gives rigidity to cell.
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