All cells, whether prokaryotic or eukaryotic, share four basic components:

1. Plasma membrane: This acts as a barrier, controlling what enters and exits the cell. It's made of a phospholipid bilayer with embedded proteins.

2. Cytoplasm: This is the gel-like substance that fills the cell and contains the organelles. It's where many metabolic reactions occur.

3. DNA (Deoxyribonucleic acid): This carries the genetic information for the cell, determining its traits and functions.

4. Ribosomes: These are responsible for protein synthesis, translating the genetic code from DNA into functional proteins.

Let me know if you want to dive deeper into any of these components!