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Question

Proteins and lipids required for building the cell membrane are produced by
  1. Mitochondria
  2. Lysosomes
  3. Golgi apparatus
  4. Endoplasmic reticulum

A
Golgi apparatus
B
Mitochondria
C
Lysosomes
D
Endoplasmic reticulum
Solution
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Plasma membrane is a living, delicate, elastic, selectively permeable membrane. Chemically, it is made up of 75% phospholipid. In addition to phospholipid, the membrane contains proteins, cholesterol and polysaccharides. Membrane synthesis or membrane biogenesis is a dynamic process, i.e., some of the membrane proteins and lipids are replaced with newly made proteins and lipids. This is an ongoing process. Some of the proteins and lipids required for membrane biogenesis are synthesized by endoplasmic reticulum.

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