Hello aspirant,
I hope that you are doing absolutely great.
With reference to your above mentioned query, I would like to tell you that biotechnology in Bsc or Btech is both good. You can choose what interests you and in that particular field.
Btech in Biotechnology is a more like a advanced course and in-depth course as compared to bsc in biotechnology. in b.tech Biotechnology you'll be taught some high-level and advanced level structures which will be much more ahead in comparison with the Bsc in biotechnology course. The btech in Biotechnology is much deeper in syllabus and more like a practical and research-based oriented. So, you'll likely to learn much more and advanced topics in Btech as compared to Bsc courses like Biotechnology.
But, that doesn't mean that bsc in biotechnology is not good. Every course in any particular fields has it's own pros and cons. It is a combination of Biology and Technology and concentrates on applications of biology in industry for the benefit of society. Biotechnology is offered by many reputed institutes in India.
Further, i would like to tell you that Maths is not a compulsory if you are looking to do B.Sc Biotechnology course. You just need to have passed (10+2) in science stream with PCM or PCB. Although for admission in B. tech in Biotechnology, Maths is a compulsory subject.
Further, you can check more about the bsc in biotechnology course by following the below mentioned link : https://www.careers360.com/courses/bsc-in-biotechnology
I hope that this will help.
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