They also locked up the offices of the university in protest, university officials said.
The officials, on condition of anonymity, alleged that Biswas was often absent since his appointment as vice chancellor on May 14 last year, jeopardizing examinations and administrative work.
They said that on one occasion he had been absent for 65 days starting from April 28, forcing the administration to appoint senior professor Bikas Ray to take temporary charge.
Biswas, on his part said, that he would reply to the complaints made by the state Higher Education Department and that he had met Governor M K Narayanan, who is the Chancellor, but the agitation by the students was wrong.
Registrar Shyamsundar Bairagya confirmed that the VC had been on leave because of illness and had informed the chancellor about it.