explain the significance of membrane with the help of an example
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Answer:
Many cellular functions, including the uptake and conversion of nutrients, synthesis of new molecules, production of energy, and regulation of metabolic sequences, take place in the membranous organelles. The nucleus, containing the genetic material of the cell, is surrounded by a double membrane with large pores that permit the exchange of materials between the nucleus and cytoplasm. The outer nuclear membrane is an extension of the membrane of the endoplasmic reticulum, which synthesizes the lipids for all cell membranes. Proteins are synthesized by ribosomes that are either attached to the endoplasmic reticulum or suspended freely in the cell contents. The mitochondria, the oxidizing and energy-storing units of the cell, have an outer membrane readily permeable to many substances, and a less-permeable inner membrane studded with transport proteins and energy-producing enzymes.
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