Institute of Physiology
- The investigation in the Institute results in contributions to physiology, pharmacology and toxicology.
- http://www.bio.bas.bg/iph/

Institute of Molecular Biology
- A national institution in the field of molecular biology, molecular genetics, cell biology, biochemistry and bioorganic chemistry.
- http://www.bio21.bas.bg/imb/

Institute of Biophysics
- Studies molecular structure, functions of biological membranes, ion channels, biopotentials, and extracellular electric fields.
- http://www.bio21.bas.bg/ibf/