He began his academic studies at the Hebrew University of Jerusalem, majoring in physics and mathematics.

He is a member of the board of the Authority for Research and Development at the Hebrew University, chairman of the Planning and Development Committee of the Faculty of Medicine and member of the Israel National Academy of Sciences advisory committee on the Human Genome.

In his early studies, Razin examined the metabolism of nucleic acids and the biochemical faults in patients with gout and favism.

[3][4] In 2008, he was awarded the Wolf Prize in Medicine, jointly with Howard Cedar, for "their fundamental contributions to our understanding of the role of DNA methylation in the control of gene expression.

"[5] Razin's work on chemical changes in the DNA molecule focuses on the molecular process that turns on and off some 40,000 genes in the human body.