Question

a certain type of specialized cell contains an unusually large amount of rough endoplasmic reticulum (er).
which of the following functions is this cell type most likely specialized to perform?
a the production and secretion of steroids
b the destruction of toxic materials produced in other cells of the organism
c the synthesis of polysaccharides for energy storage
d the production and secretion of proteins

Explanation:

Rough endoplasmic reticulum (rough ER) is studded with ribosomes, which are responsible for protein synthesis. Cells with large amounts of rough ER are specialized for producing and secreting proteins (e.g., pancreatic cells that secrete digestive enzymes). Steroid production is linked to smooth ER, toxic material destruction to lysosomes, and polysaccharide synthesis to other organelles like the Golgi apparatus or cytoplasm. Thus, the cell’s function aligns with protein production/secretion.

Answer:

D. The production and secretion of proteins