hi,

in the official website of kariavattom, there is no previous years questions papers for m.sc entrance, some of the popular msc biotechnology entrances are iit jam, jnu ceeb, etc. so I suggest you to follow the previous papers of mentioned entrance test. some of the books you may follow to prepare for msc entrance test is,

JNU Combined M.Sc. Biotechnology Entrance Examination Guide  by RPH Editorial Board.

MCQs for M.Sc. Biotechnology Entrance Examinations Paperback

by Dr. Vishal P. Deshmukh (Author), Dr. Varsha V. Deshmukh (Author), Dr. Vivek R. Narkhedkar.