| Term | Definition |
| Examples of prokaryotes | Bacteria and Archaea |
| Examples of eukaryotes | Protists, fungi, animals, and plants |
| Plasma membrane | all cells are bounded by a membrane called a |
| cytosol | a semifluid substance in which organelles are found |
| chromosomes | All cells contain ... which carry genes in the form of DNA |
| Ribosomes | All cells contain ... which are tiny organelles that make proteins according to instructions from the genes |
| Difference between prokaryotes and eukaryotes | the chromosomes of a eukaryotic cell are located in a membrane-enclosed organelle called the nucleus, whereas in a prokaryotic cell, the DNA is located in a region called the nucleoid, but no membrane separates this region from the rest of the cell |
| Cytoplasm | the entire region between the nucleus and the plasma membrane, this term is also used for the interior of a prokaryotic cell |
| Function of the plasma membrane | a selective barrier that allows sufficient passage of oxygen, nutrients, and wastes to service the entire volume of the cell |
| Biological membranes | consist of a double layer (bilayer) of phospholipids and other lipids |