Science Eligibility

It's simple. You need to pass your 10+2 with at teast 50% in your PUC and that's your eligibility.

Hello,
List of entrance exams after completing graduation B.Sc:
1) For M.Sc. Entrance exam:-
IIT JAM
BITSAT
TIFR GS &
Other university entrance exams.
2) For Government services:-
UPSC
SSC
And, other state level government services.

I don't think so that their is any age limit for Ph.D. You can do PhD at any age.

If you are a Science Student, then your first priority should be to go for B.Tech in CSE/IT. If you can get admission into B.Tech, then you should definitely pursue B.Tech without giving it a second thought. And, if you aren't eligible for B.Tech, then BCA is also a good course to pursue and enter into IT Industry. For admission into BCA you need to score at least 45% in your +2, if you can score and meet this criteria then you can get admission very easily. The scope of any course depends upon the caliber of the candidate.

Hi,
Biomedical Engineering: Eligibility.
Candidate must have passed the 10+2 or equivalent examination from a recognised state or central board with at least 50% (40% to 45% for reserved category candidates) of the marks with physics, chemistry, and mathematics/biology as the major subjects of study. In some colleges they required Maths for admission. Thanks!

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