St. Xavier's College Kolkata

You must have a B.Sc with 60% and must have a good score in the entrance exam.
For more Information, visit the link
https://www.shiksha.com/science/course/m-sc-in-microbiology-st-xavier-s-college-park-street-kolkata-286671

No, you're not eligible to get admission in this college.

The compulsory subjects for Integrated M.Sc Biotechnology program in +2 are Biology/Biotech, Chemistry, Physics & Mathematics. The subject considered for aggregate calculation are Physics + Chemistry + Biology/Biotech + Mathematics.
The marks requirement for Application: Agg 60%, Biology 60% & Chemistry 60%.
The selection will be based on an index calculated with the board marks in +2 level, and the index calculation will be made as followed AGG% + BIO% + CHEM% (OUT OF 300).
Hence, you need minimum 60% aggregate marks in +2 with bio 60% and chemistry 60%.

Sorry to say, you cannot.

No, it is upto your HS performances.

Till now no. College generates a separate merit list on the basis of your HS result [for previous year, it was (2 x physics + maths + english) / 4], and then publish the name of shortlisted candidates on its website -&get; www.sxccal.edu.

Sorry, you cannot, you need at least 90 for CBSE/ISC or 85 for State Board to get into SXC.