Hello Aspirant. 

.WHAT IS IIT JAM? 

IIT JAM is Indian Institute of Technology - Joint Admission Test for those candidates who want to pursue an M.Sc. from IIT and IISc.

IIT JAM 2020 is conducted for seven subjects, one of its Biological Sciences. 

So here, I'm providing the topics which are included in IIT JAM Biological Science and best books for the preparation.

 TOPICS: -

.General Biology

 .Basics of Biochemistry, Molecular Biology, Biophysics

 .Microbiology, Cell Biology, and Immunology

 .Mathematical Sciences

 BOOKS: -

.Life Sciences: Fundamentals and Practice – I, II: -Pranav Kumar, Usha Mina

.Principles of Genetics: -Gardner, Simmons, Snustad

.Cell and Molecular Biology: - Karp

.Biochemistry: -Jeremy M. Berg, Lubert Stryer, John L. Tymoczko

.Developmental Biology: - Scott F. Gilbert, Susan R. Singer

.Kuby Immunology: - Barbara A. Osborne, Richard Goldsby

.Essentials of Physiology: - Lauralee Sherwood

.Molecular Biology of the Cell: -Bruce Alberts

.Microbiology: -John P. Harley, Donald Klein. 

Hope the answer will prove to be helpful.

All the best.