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The proteins and lipids, essential for building the cell membrane, are manufactured by
,b>(a) rough endoplasmic reticulum
(b) Golgi apparatus
(c) plasma membrane
(d) mitochondria.
Correct Answer: None. The Correct Answer is an endoplasmic reticulum (not rough endoplasmic reticulum alone)
Explanation:
The endoplasmic reticulum is a network of membranous tubules found within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane.
It is a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells. It serves multiple functions, such as protein and lipid synthesis, folding, modification, and transport of proteins.
The endoplasmic reticulum is a type of cell organelle made up of two subunits:
the rough endoplasmic reticulum, and smooth endoplasmic reticulum.
(i) The rough endoplasmic reticulum has ribosomes attached to it and is involved in protein synthesis.
(ii) The smooth endoplasmic reticulum plays a crucial role in detoxifying many poisons and drugs in a cell. It is also responsible for lipid synthesis.
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