B.Sc

Hello,
Thanks for asking.
After completing B.Sc, there are various options available for you.
You can prepare for Competitive Exams to get a Government Job like : IBPS PO Bank Exam, IBPS Clerk, IBPS RRB, SBI PO, SBI Clerk, RBI Exam, LIC Exams etc.
If you are not interested in Bank Jobs then you can also try SSC CGL, Railway RRB , NTPC, UPSC Exams etc.
The competition level of these exams are little higher so you have to prepare well for the exams.
Get Tips to get PSU jobs : https://www.youtube.com/watch?v=HFjFFBcUW2A
Best of luck.

You don't have to write any entrance exam.

I think you should look for another colleges too because that college doesn't have good reputation.

You can try in food sector as per the eligibility criteria.

I think, you should go for biotechnology. Biotechnology has lot of scope in future. You can go for research, genetic engineering, immunology, microbiology, bioinformatics, plant tissue culture, animal tissue culture, microbial biotechnology and much more.
All the best.

Yes, you can do that. You need to crack the entrance exam such as CAT, MAT, XAT, etc. in order to get admission in a suitable college.