Which describes the primary function of the Golgi apparatus in a eukaryotic cell?

Which describes the primary function of the Golgi apparatus in a eukaryotic cell?

• A. It modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.
• B. It synthesizes ATP through oxidative phosphorylation.
• C. It is the main site of DNA replication.
• D. It generates heat for thermoregulation.

Answer: (A)

Think of the Golgi apparatus as the cell’s processing and shipping center. It takes proteins and lipids arriving from the endoplasmic reticulum, modifies them (for example, adding carbohydrate groups and other tags), and then sorts and packages them into new vesicles. These vesicles carry the molecules to where they’re needed: outside the cell, the plasma membrane, or other organelles like lysosomes. The cis face welcomes cargo from the ER, and the trans face sends it off after the finishing touches. Other options point to functions outside the Golgi: ATP production happens in mitochondria, DNA replication occurs in the nucleus, and heat generation isn’t a dedicated role of this organelle.

Think of the Golgi apparatus as the cell’s processing and shipping center. It takes proteins and lipids arriving from the endoplasmic reticulum, modifies them (for example, adding carbohydrate groups and other tags), and then sorts and packages them into new vesicles. These vesicles carry the molecules to where they’re needed: outside the cell, the plasma membrane, or other organelles like lysosomes. The cis face welcomes cargo from the ER, and the trans face sends it off after the finishing touches.

Other options point to functions outside the Golgi: ATP production happens in mitochondria, DNA replication occurs in the nucleus, and heat generation isn’t a dedicated role of this organelle.