Question
Discuss which organelles are responsible for sorting, packaging, processing, and modifying proteins?
Answer :
Word Count : 415
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In molecular cell biology, the synthesis, sorting, processing, and modification of proteins are essential for cellular function and are carried out by a coordinated network of organelles. Proteins are synthesized on ribosomes, either free in the cytosol or bound to the rough endoplasmic reticulum (RER). Ribosomes on the RER produce proteins destined for secretion, incorporation into membranes, or delivery to specific organelles. Once synthesized, these nascent proteins enter the lumen of the RER, where initial folding and modifications, such as the formation of disulfide bonds, occur. The RER also plays a critical role in the quality control of proteins, ensuring that misfolded or incomplete proteins are targeted for degradation via the ER-associated degradation pathway. After initial processing in the RER, proteins are packaged into transport vesicles that bud off from the ER and move toward the Golgi apparatus. The Golgi apparatus functions as the central
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