hi,

see first of all you need to study the full syllabus and previous years papers to understand the questions levels and difficulty, however some of the books which is best to follow,

IIT-JAM: MSc (Biotechnology) Previous Papers (Solved) by R Gupta

Biochemical Calculations by Irwin H Segel

Molecular Cloning by Sambrook and Russel

Principles of Gene Manipulation     by Sandy B Primrose, Richard Twyman, Bob Old

Basic Immunology by Abbas and Litchmann

Prescott’s Microbiology     by Joanne Willey, Linda Sherwood, Chris Woolverton

Microbiology by  Michael Pelczar Jr

Genetics (Benjamin/Cummings Series in the Life Sciences) by Peter J Russell