Indian Institute of Science

Most institutes offering the course admit students based on their performance in a relevant entrance test followed by a round of Personal Interview. Admission process generally varies across colleges.
Candidates are selected based on performance in the Research Eligibility Test (RET) and interview conducted by a given institute.
Candidates who have already qualified UGC/ CSIR (JRF)/ NET/ GATE/ M.Phil./ M.Tech., or equivalent examinations, are not required to appear for the Ph.D. entrance test, but need to appear for the round of Personal Interview.
Some of the top institutes in India which conduct entrance tests for admission to the course are:
University of CalcuttaAgra UniversityOsmania University

Hello Shanu,
You can appear for IIT JAM Bio technology examination. The IIT JAM exam is a national level exam, which is held for the admission into IITs, or IISc institutes for M.Sc. M.Sc-PhD and other integrated courses. IIT JAM Exam is held for six subjects physics, mathematics, geology, chemistry, mathematical statistics and bio-technology subjects. The candidates must have completed the graduation degree in that subject for minimum 4 sem or 2 years. As you have completed the B.Sc. In Bio tech, you should apply for IIT JAM Bio technology subject, Make sure that you fulfill all the eligibility criteria for the exam from official website.