Answer:
Together, the total area of a cell's internal membranes far exceeds that of its plasma membrane. Like the plasma membrane, organelle membranes function to keep the inside "in" and the outside "out." This partitioning permits different kinds of biochemical reactions to take place in different organelles.
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Explanation:
Cells can confine potentially harmful proteins and molecules in membrane-bound organelles that protecting the rest of the cells from their harmful effects.
