Which organelle packages proteins for secretion?

Which organelle packages proteins for secretion?

• A. Rough ER
• B. Smooth ER
• C. Golgi complex
• D. Mitochondria

Answer: (C)

Proteins destined for secretion are handled first in the rough endoplasmic reticulum, where they’re synthesized and start folding. They’re then carried in vesicles to the Golgi complex, which acts as the processing and packaging center. In the Golgi, proteins are modified, sorted, and packed into secretory vesicles that move to the plasma membrane and release their contents outside the cell. This makes the Golgi complex the key step for packaging and sending proteins out of the cell. The rough ER handles initial synthesis, the smooth ER focuses on lipids and detoxification, and mitochondria generate energy, so they don’t perform this packaging role.

Proteins destined for secretion are handled first in the rough endoplasmic reticulum, where they’re synthesized and start folding. They’re then carried in vesicles to the Golgi complex, which acts as the processing and packaging center. In the Golgi, proteins are modified, sorted, and packed into secretory vesicles that move to the plasma membrane and release their contents outside the cell. This makes the Golgi complex the key step for packaging and sending proteins out of the cell. The rough ER handles initial synthesis, the smooth ER focuses on lipids and detoxification, and mitochondria generate energy, so they don’t perform this packaging role.