  The paper proposes a photoinduced quantum tunneling model of electron
transfer through four quantum square wells potential to simulate the biological
process of photosynthesis in bacteria. The problem is mathematically exact with
mathematical transcendental equations solved graphically. This simplified model
allowed the calculation of the characteristic tunneling times of the process. A
comparison is made between the results obtained in the model and the
experimental data of the organic molecule Rhodobacter sphaeroides
photosynthetic process.
