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Question

List any two benefits of selective permeability of plasma membrane.


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Solution

Plasma membrane:

  1. An outermost envelope-like membrane or a structure, which surrounds the cell and its organelles is called the plasma membrane.
  2. It is a double membraned cell organelle.

Benefits of selective permeability of plasma membrane:

  1. It allows the entry of only useful molecules, such as substances like food molecules, water,salts, and oxygen; and regulatory substances like vitamins and hormones.
  2. It permits the exit of waste materials from the cell.
  3. These waste materials include chemical by-products like carbon dioxide and nitrogenous wastes.
  4. The metabolically useful materials are retained in the cell for reuse.

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