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what is endoplasmic reticulum in biology​

Answer 1

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The endoplasmic reticulum (ER) is a type of organelle found in eukaryotic cells that forms an interconnected network of flattened, membrane-enclosed sacs or tube-like structures known as cisternae. The membranes of the ER are continuous with the outer nuclear membrane. The endoplasmic reticulum occurs in most eukaryotic cells, but is absent from red blood cells and spermatozoa.

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Answer 2

Answer:

Endoplasmic reticulum (ER), in biology, a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteinsa network of tubular membranes within the cytoplasm of the cell, occurring either with a smooth surface (smooth endoplasmic reticulum) or studded with ribosomes (rough endoplasmic reticulum), involved in the transport of materialsFunctions of Endoplasmic Reticulum (ER)

They play a vital role in the formation of the skeletal framework. They play a vital role in the synthesis of proteins, lipids, glycogen and other steroids like cholesterol, progesterone, testosterone, etc.Endoplasmic Reticulum - Wrapping it Up

Structurally, the endoplasmic reticulum is a network of membranes found throughout the cell and connected to the nucleus.