Question

12 multiple choice 1 point the organelle that synthesizes proteins to be exported or used in membranes is: smooth er nucleolus rough er lysosome

Explanation:

The rough endoplasmic reticulum (Rough ER) has ribosomes attached to its surface. These ribosomes synthesize proteins that are either to be exported from the cell or used in membranes. The smooth ER is involved in lipid synthesis and detoxification. The nucleolus is involved in ribosome - subunit formation. Lysosomes contain digestive enzymes.

Answer:

C. Rough ER