Question

which of the following modifies proteins that are made on the rough endoplasmic reticulum before being secreted to the outside of the cell?
peroxisome
lysosome
golgi apparatus
mitochondrion

Explanation:

• Peroxisome: Involved in lipid metabolism and the detoxification of harmful substances, not protein modification.
• Lysosome: Contains digestive enzymes for breaking down waste materials and cellular debris, not protein modification.
• Golgi apparatus: Modifies, sorts, and packages proteins (and lipids) that are synthesized on the rough endoplasmic reticulum for secretion or delivery to other organelles.
• Mitochondrion: The powerhouse of the cell, generating ATP through cellular respiration, not directly involved in protein modification for secretion.

Answer:

Golgi apparatus