Photobiology or Biological Photochemistry is an interacademic branch of biology and chemistry which deals with the biochemical processes, produced or activated by light, in plants and animals, for instance, the life phenomena induced by light of various wave lengths, certain growth statutes, some physiological and pathological processes, the occurrence of certain diseases and their curing mechanisms, radiation damage and repair of cells in vivo, and the role played by phycobiliproteins in the evolution of life, etc. In this paper, seven light induced biological phenomena, namely, the human vision, the photoperiodism, the photosynthesis, the radiation damage and its repair, the treatment of psoriasis, the curing mechanism of neonatal jaundice and the photosynthetic pigments are reviewed. A review with 23 references

Key words: PHOTOCHEMISTRY, BIOCHEMISTRY, BIOCHEMICAL CHARACTER