Name four structural features that can be found in a eukaryotic cell

Nucleus: The nucleus is a membrane-bound organelle that contains the cell's genetic material, DNA. It acts as the control center of the cell and is responsible for regulating gene expression and directing cellular activities.

Mitochondria: Mitochondria are double-membrane-bound organelles that are responsible for producing energy in the form of ATP through cellular respiration. They have their own DNA and ribosomes and are thought to have evolved from ancient symbiotic bacteria.

Endoplasmic reticulum (ER): The ER is a network of membrane-bound tubules and sacs that is involved in the synthesis, folding, and transport of proteins and lipids. There are two types of ER - rough ER, which is studded with ribosomes and involved in protein synthesis, and smooth ER, which lacks ribosomes and is involved in lipid metabolism and detoxification.

Golgi apparatus: The Golgi apparatus is a stack of flattened membrane-bound sacs that is involved in the modification, sorting, and packaging of proteins and lipids for transport to their final destinations. It receives proteins from the ER and modifies them by adding carbohydrates or other molecules before packaging them into vesicles for transport