As you want to get the details of career and pay scale after M.Sc in Biotechnology so here is the information of the same for you:

M.Sc. Biotechnology Job Types

Research Scientist
Research Associate
Teacher
Marketing Manager
Bio-informist
Quality Control Officer
Production in-charge in the Food, Chemical and Pharmaceutical industries
Analyst (Venture-Capitalist)
Environmental or Safety Specialist
Lab Technician
Engineer (Chemical, Electrical, Environmental and Industrial)
Medical Representative
Business Development Manager

Some of the biotechnology companies in India: -

Excel Industries Limited, Mumbai
BrainWave Bioinformatics Ltd., Chennai
Catalyst Pharma Consulting , Mumbai
Hi Tech Bio Laboratories, Pune
Aristo Pharmaceuticals Ltd., Mumbai
Sisco Research Laboratories Pvt. Ltd., Mumbai
Rajiv Gandhi Center for Biotechnology, Kerala (RGCB)
Biotech Consortium India Limited, New Delhi
All India Biotech Association (AIBA), New Delhi
Amersham Pharmacia Biotech Asia Pacific Ltd., Chennai

Pay Scale:
Freshers in this field candidate can earn around Rs. 15,000 - 20,000 every month.

Fresh IIT pass out graduates working in corporate sector can earn salary between Rs. 70,000 - Rs. 85,000 per annum.