Question

proteins destined for extracellular release are packaged in specific vesicles. after packaging, the vesicles bud off and are stored in the cell until a signal is given for their release. when the appropriate signal is received they move towards the membrane and fuse to release their contents. once proteins have been produced at the ribosomes, what two organelles work together to aid in the secretion process described above? a ribosome and er b golgi apparatus and rough er c golgi apparatus and lysosome d mitochondria and rough endoplasmic reticulum

Explanation:

The problem is about the secretion process of proteins, specifically the organelles involved after protein production at ribosomes. The rough ER (endoplasmic reticulum) is involved in protein synthesis and initial processing, and the Golgi apparatus modifies, sorts, and packages proteins into vesicles for secretion. Option B lists Golgi apparatus and rough ER, which are the key organelles in the post - ribosomal protein secretion pathway. Option A: ribosome and ER - ribosome is where protein is produced, but the question is about after production. Option C: Golgi and lysosome - lysosome is for digestion, not secretion. Option D: mitochondria and rough ER - mitochondria provide energy but aren't the main organelles for secretion after production.

Answer:

B. Golgi apparatus and rough ER