Todd was born near Glasgow, Scotland and graduated from Glasgow University with a B.Sc.
Todd became the Sir Samuel Hall Professor of Chemistry and Director of the Chemical Laboratories of the University of Manchester in 1938, where he began working on nucleosides, compounds that form the structural units of nucleic acids (DNA and RNA).
Serving as chairman of the British government's advisory committee on scientific policy from 1952 to 1964, was made Sir AlexanderTodd in 1954 and Baron Todd, of Trumpington in the County of Cambridgeshire, in 1962.
Sir Alexander Robertus Todd was born in Glasgow on October 2, 1907, the elder son of AlexanderTodd, a business man of that city, and his wife Jean Lowrie.
He is a Fellow of the Royal Society, foreign member of the National Academy of Sciences, the American Academy of Arts and Sciences, the Austrian Academy of Sciences and the Spanish Council of Scientific Investigation, and an honorary member of the French, German and Spanish chemical societies and member of the Deutsche Akad.
Todd has taken considerable interest in international scientific affairs; he is President of the International Union of Pure and Applied Chemistry, and Chairman of the British National Committee for Chemistry.