What type of cell has membrane-bound organelles, can be unicellular or multicellular, and is structurally complex?

The answer for the above question is Eukaryotic cell.

Eukaryotic cells are cells that contain membrane-bound organelles and the membrane bound nucleus. They are more structurally complex; they have specialized compartments where various reactions can take place. These cells may be unicellular or multicellular, and include protists, plants, fungi, and animal cells.