Final answer:
The incorrect description given is the role of peroxisomes in breaking down phagocytosed debris; that function is actually carried out by lysosomes. Other options correctly describe functions of mitochondria, rough and smooth endoplasmic reticulum, and the Golgi apparatus.
Step-by-step explanation:
The incorrect description of the function of the organelle in the options given is: Breakdown of phagocytosed debris occurs in the peroxisomes. The correct organelle responsible for the breakdown of phagocytosed debris is the lysosome, not the peroxisome. Peroxisomes are involved in the breakdown of very long chain fatty acids, synthesis of plasmalogens (phospholipids), and the detoxification of hydrogen peroxide. Lysosomes, on the other hand, contain hydrolase enzymes that break down biomolecules, digest macromolecules, recycle worn-out organelles, and destroy pathogens. Thus, C) is the incorrect statement among the options listed.
The other options given are correct descriptions of organelle functions: ATP synthesis occurs in the mitochondria; peptide hormone synthesis occurs in the rough endoplasmic reticulum; packaging of secretory products into vesicles occurs in the Golgi apparatus; and calcium is stored in the smooth endoplasmic reticulum.