Which organelle modifies, sorts, and packages proteins for storage or release?

• A. Golgi apparatus
• B. Endoplasmic Reticulum
• C. Ribosome
• D. Nucleus

Answer: (A)

Proteins destined for storage or release are processed by the Golgi apparatus. It receives newly made proteins from the rough endoplasmic reticulum, where they may already have some modifications, and then adds further carbohydrate groups and other tweaks. The Golgi then sorts them according to address signals and packages them into vesicles that will either be stored in the cell or sent outside, delivered to lysosomes, or inserted into the plasma membrane. The cis face accepts cargo from the ER, and the trans face ships it to its final destination, ensuring proteins reach the right place.

Synthesis and initial modification happen in the endoplasmic reticulum, where ribosomes build proteins and begin folding. The nucleus houses DNA and governs transcription. The Golgi’s distinct role is the final processing and precise packaging for targeted delivery.