Which type of cell contains membrane-bound organelles?

Eukaryotic cells are characterized by the presence of membrane-bound organelles, which include structures such as the nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus. These organelles perform specific functions that are essential for the cell’s survival and proper functioning. For example, the nucleus houses the cell's genetic material and is involved in regulating gene expression, while mitochondria are responsible for energy production through aerobic respiration.

In contrast, prokaryotic cells, such as bacteria, lack membrane-bound organelles. Instead, their cellular processes occur in the cytoplasm, where ribosomes and other components are freely suspended. The absence of a true nucleus and other organelles allows prokaryotic cells to be simpler and typically smaller than eukaryotic cells.

Therefore, the distinguishing factor regarding membrane-bound organelles clearly points to eukaryotic cells as the correct answer. Understanding this distinction is fundamental for studying cell biology and the differences in complexity between these two cell types.