Yes, yeast cells do have membrane-bound organelles, although they are simpler and less diverse than those found in eukaryotic cells like animal or plant cells.

Here are some of the membrane-bound organelles found in yeast cells:

* Nucleus: Contains the genetic material (DNA) and is enclosed by a double membrane called the nuclear envelope.

* Endoplasmic reticulum (ER): A network of interconnected membranes involved in protein synthesis, lipid metabolism, and calcium storage.

* Golgi apparatus: A stack of flattened membrane-bound sacs responsible for processing and packaging proteins.

* Mitochondria: The "powerhouse" of the cell, responsible for ATP production through cellular respiration.

* Vacuoles: Large, fluid-filled sacs that store water, nutrients, and waste products.

* Peroxisomes: Small, membrane-bound organelles that contain enzymes involved in various metabolic processes.

While yeast cells have these organelles, they lack some of the more complex organelles found in other eukaryotes, such as lysosomes, chloroplasts, and a well-defined cytoskeleton.

This is one of the reasons why yeast is often used as a model organism in research, as its simpler structure allows for easier study and manipulation.