Final answer:
The place within the cell where proteins and lipids are made but not by the organelle itself is the endoplasmic reticulum (ER), which transports these molecules to their next destination.
Step-by-step explanation:
The organelle in question where proteins and lipids are made but is not the actual structure that synthesizes them is the endoplasmic reticulum (ER). There are two types of ER: the smooth ER and the rough ER. The rough ER is studded with ribosomes, which manufacture proteins that enter the ER to be modified and transported. The smooth ER is involved in lipid synthesis and lacks ribosomes. Both types of ER work as manufacturing and packaging systems, transporting these vital molecules to the Golgi apparatus or other destinations within the cell.