There are many courses that are available for students after B.Sc in biotechnology. You have an option to study and work in India or overseas. Some of the courses are-

Master of Science in Medical Biotechnology
Master of Technology in Biotechnology
Integrated PhD courses
Master of Philosophy in Biotechnology
Master of Science in Applied Biotechnology
Master of Science in Zoology (Animal Biotechnology)
Master of Science in Biotechnology
Master of Science in Industrial Biotechnology
Master of Science in Marine Biotechnology
Master of Science in Plant Biotechnology
PhD in biological sciences
Ph.D. Biotechnology
Post Graduate Diploma in Biotechnology
Post Graduate Diploma in Clinical Research
Post M.Sc. (Agriculture) Biotechnology
Graduate Diploma in Pharma Biotechnology
Master of Veterinary Science in (Animal) Biotechnology
M.Tech. Biotechnology
Master of Science in. / Master of Veterinary Science in Veterinary Biotechnology
Master of Technology in Biomedical Engineering / Biotechnology

M.Sc Medical Biotechnology colleges in India

Ayush and Health Science University
G.E. Road
Raipur, Chhattisgarh

Calcutta School of Tropical Medicine
108, Chittaranjan Avenue
Kolkata, West Bengal

Chettinad University - CU
Chettinad Health City Rajiv Gandhi Salai Kelambakkam
Kanchipuram, Tamil Nadu

Dolphin P.G. College of Science and Agriculture
Chunnikalan, 20 KM from Chandigarh on Chandigarh-Sirhind State Highway-12A
Fatehgarh Sahib, Punjab

Jankidevi Bajaj College of Science
Jamnalal Bajaj Marg, Civil Lines
Wardha, Maharashtra

Jawaharlal Institute of Post Graduate Medical Education and Research (JIPMER)
Dhanvantri Nagar, Gorimedu
Puducherry, Puducherry

Maharaja Sayajirao University of Baroda
Kalabhavan, Rajmahal Road, Near Kirtistambh
Vadodara, Gujarat

Maharshi Dayanand University - MDU
(NH-10,) (Near Sugar Mill)
Rohtak, Haryana

Mahatma Gandhi Mission Institute of Health Sciences - MGMIHS
MGM Campus, Sector 1, Kamothe, Navi Mumbai
Mumbai, Maharashtra

Manipal University
Madhav Nagar
Manipal, Karnataka

Pravara Institute of Medical Sciences
A/P. Loni, Tal. Rahata
Ahmednagar, Maharashtra

Punjabi University
NH-64, Urban Estate Phase II
Patiala, Punjab

Rajiv Gandhi Institute of Information Technology and Biotechnology - RGITBT
Bharati Vidyapeeth Deemed University Dhankawdi, Katraj,
Pune, Maharashtra

Santosh University
No. 1, Santosh Nagar
Ghaziabad, Uttar Pradesh

School of Life Sciences (SOLS)
Manipal, Karnataka

Sikkim Manipal Institute of Medical Sciences
5th Mile, Tadong
Gangtok, Sikkim

Sikkim Manipal University
5th Mile Tadong
East Sikkim, Sikkim