What is the main function of the Rough Endoplasmic Reticulum (RER)?

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A Synthesis of protein
B Production of ATP
C Digestion of cellular waste
D Synthesis of lipid

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Answer: A. Synthesis of protein

Rough ER is called rough because ribosomes are attached to its surface. These ribosomes make proteins, and the RER helps carry them through the cell. ATP is made by mitochondria.

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What is the main function of the Rough Endoplasmic Reticulum (RER)?

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