Mrityunjoy was born to a Bengali Hindu family of Mymensingh, then part of India. Now Bangladesh which became a new country in 1971 following its separation from Pakistan which, in turn, was earlier shaped as a result of the partition of British India in 1947.
He completed his intermediate & formal education at Rajshahi College (1934-1938).
Later on he pursued Masters in Chemistry at Presidency College, Calcutta University (1938-1940).
Bachelor of Science (Honors) Chemistry, Rajshahi College, 1938 M.Sc (First Class) 3rd Place, Calcutta University, 1940 Cunningham Memorial Prize, Presidency College, Calcutta 1940 Griffith Memorial Prize, Calcutta University, 1952 Doctor of Philosophy, Calcutta University, 1955 Rabindra Puraskar, Government of West Bengal, 1964 United Nations Educational, Scientific and Cultural Organization Prize for Manuscript entitled "Bijnaner Bichitra Barta" in Bengali, Government of India, 1969 Sishu Sahitya Rashtriya Puraskar, 1970 Ila Chanda Memorial Prize (Bangiya Bijnan Parishad) Kishore Gyan Vigyan Puraskar, 1993 T.M. Das Foundation Award, 2002.
