Question

which organelle consists of a stack of flattened membranes, each enclosing a single compartment?
smooth endoplasmic reticulum
lysosome
rough endoplasmic reticulum
golgi apparatus

Explanation:

The Golgi apparatus is characterized by a stack of flattened membranes (cisternae), each enclosing a single compartment. The smooth endoplasmic reticulum is a network of membranes without ribosomes on its surface. Lysosomes are single - membrane bound organelles containing digestive enzymes. The rough endoplasmic reticulum has ribosomes attached to its surface and is also a network of membranes.

Answer:

Golgi apparatus