Biology

The correct answer is C.Synthesizing proteins.

Ribosomes attached to the rough endoplasmic reticulum (rough ER) are primarily involved in protein synthesis. These ribosomes translate messenger RNA (mRNA) into polypeptide chains, which are then folded and often undergo initial modifications in the rough ER. Once synthesized, the proteins can be further processed in the rough ER and then transported to the Golgi apparatus for additional modifications and packaging.

Here’s a breakdown of the other options:

A.Synthesizing lipids: This is the ...