Science Eligibility

Yes, you are eligible. Just have a look which university offers this course. Some universities may conduct their own entrance exams.

Yes, you can apply for the course.
Best wishes for your future.

No for M.Sc, you need to do B.Sc.

Hi Sai,
Yes, admission is through counseling based on the rank obtained in Banaras Hindu University Postgraduate Entrance Test (BHU-PET) conducted by the university.
https://www.shiksha.com/science/course/m-sc-in-food-science-and-technology-banaras-hindu-university-varanasi-272597

You follow with SSC UPSC and district councils exam.

The course is offered to candidates who have completed their 10+2 or equivalent level education with a minimum of 50% marks (Relaxable for reserved category candidates) from a recognized board/institute. Those who have done a diploma after class 10th as a part of 10 +3 pattern of education can also apply for admission to the course.

Yes,
You are eligible for JAM IIT biological Science exam. For appearing in JAM IIT Exam, some essential qualification also required. Candidates who want to go to the admission in Integrated Ph.D in Biological Sciences through JAM IIT https://goo.gl/521eUm must have Biology/ Chemistry/ Physics/ Mathematics as Essential subjects in Bachelor's degree along with minimum duration and biology subject in class 12th.

Yes, you are eligible for the post, and can give CTET. Wish you all the best.

Food Science will be the best option for you. Since you are already a Diploma holder in the related field.

You are eligible, but for that you have to give TOEFL or IELTS.