Dear Rashmi,
For your kind information, yes after pursuing a Bachelor of Science in (Zoology, Botany, and Chemistry) you can opt for Master in Science in Biotechnology. The only major difference you will see will be in practical education. For checking out the syllabus for M.Sc you can go through this link in which syllabus of BHU MSc is given:
http://www.bhu.ac.in/syllabus/MScBiotechnology.pdf
I hope that'll help you, best of luck for your further career prospects.
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