[SunilNagpal]

Hi Shairil,
I assume, by fields you mean job opportunities?
It is usually suggested to go for MSc in the specific field of interest first. That opens up quite good options as compared to BSc. Especially, preparing for JAM and targeting a top tier college will help a lot in propelling your career.

Having said that, it doesn't mean that there are no job options post BSc. Following are the fields open to a person who has completed BSc in Biotechnology:
a) Job in Pharma or F&B Companies in Formulation or Quality Control
b) RA ship in government labs like CSIR labs.
c) Medical writing and coding
d) CROs / CRAMs

As expected, these won't be high pay jobs, but will definitely help in obtaining good experience for a better future ahead.

My personal opinion: Prepare for JAM and target MSc in top tier college. Maths isn't limiting factor for it.

Hope it helps

Best wishes

(If you haven't, go for installing Biotechnology Forums app from Google playstore. Conversations are easy to manage and keep track of on app).