The correct answer is: D. All of these
Prokaryotic cells are the simplest type of cell. They do not have a nucleus or any other membrane-bound organelles. Instead, their DNA is located in the cytoplasm, which is the jelly-like substance that fills the cell. Prokaryotic cells also have ribosomes, which are responsible for protein synthesis.
Nucleolus: A nucleolus is a small, dense region of the nucleus that contains proteins and RNA. It is involved in the production of ribosomes.
Nuclear membrane: The nuclear membrane is a double-membrane structure that surrounds the nucleus. It controls the movement of materials into and out of the nucleus.
Membrane-bound organelles: Membrane-bound organelles are specialized structures that carry out specific functions in the cell. Examples of membrane-bound organelles include mitochondria, chloroplasts, and the endoplasmic reticulum.
Prokaryotic cells lack all of these structures. This makes them simpler than eukaryotic cells, which have a nucleus and other membrane-bound organelles.