He was minister of state for Chemicals and Fertilizers (September 2000 – June 2002) and later for Commerce and Industry (July 2002 – October 2003) in Atal Bihari Vajpayee ministry.

[1] Mookherjee was born on 8 May 1932 in Sylhet in Assam (now Bangladesh), he was educated at Calcutta University.

He did his Bar-at-law from The Honourable Society of Lincoln's Inn[2] and also pursued further studies at the Regent Street Polytechnic in London.

Mookherjee being a Senior Advocate, was an additional solicitor general of India before being elected,[3] in 1999, to the 13th Lok Sabha from Krishnagar (Lok Sabha constituency) in West Bengal as a candidate of Bharatiya Janata Party.

[2][4] Mookherjee was the nephew of Sankar Das Banerji, Speaker of West Bengal.