Here are some of the tips from my friends at JNU that can help you score well in the entrance for M.Sc Biotechnology. 

• Clear your basics on core subjects like Biochemistry (Enzyme Kinetics, Bio-Energetics), Genetics, Cell-biology. 
• Practice probability-related questions. These are quite scoring and there are a good number of questions asked from these topics. 
• Ecology and Evolution are the other areas that you should stress. If your undergraduate study included immunology developmental biology then you should revise those topics well. 
• Also, practice from previous year’s question papers. Also, try to cover the last 5 years of GATE life science papers. 
• Try to do maximum number of questions in both sections of the examination. 

There are very few seats available, so prepare sincerely.