4.6 Other Vesicles and Vacuoles

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Function of large central vacuole in plant

Gives support to the cell; maintains turgor pressure in cell; stores nutrients and waste products

Difference between vesicles and vacuoles

Vesicles: pinched off membrane that transport materials between organelles Vacuoles: larger and store excess substances

Important function of peroxisomes

active in lipid metabolism

Hydrogen Peroxide

created as the result of actions performed by enzymes in peroxisomes

Many small vacuoles

found only in animal cell

One large central vacuole

found only in plant cell

Peroxisomes

membrane bound vesicles that enclose enzymes; enzymes synthesized by free ribosomes in cytoplasm

Vacuoles

membrane sacs that are larger than vesicles; stores excess substances

Turgor pressure

pushes the plasma membrane against the cell wall of plant; provides structural support

Function of vacuole

storage of nutrients and waste products, provides supports, and reservoir for water


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