Science

Go for BCA, then do higher studies to get excellent job.

You can find employment opportunities in
1. Pharma companies
2. Large nurseries and farms
3. Agricultural universities and Research Centers etc. as
A. Bio Technologist
B. Bio Tech. Advisor
C. Research Assistant etc.
You can choose teaching profession after NET / M.Phil / PhD . UGC scale is very much attractive.
All the Best

Both are different courses with different career profile. If you are looking for an industry change , better go for MBA, or else please go ahead with M.Sc-Microbiology. Please note that General M.Sc-Micro and Medical Micro Biology are different. Better go for M.Sc- Medical Microbiology that will help you to get placement as Senior Microbiologist in Laboratories, Hospitals etc.

manipal university fee structure see website

Hello, well it depends where you want to study. Not all universities require GMAT or GRE. As an international student however you must take TOEFL or IELTS.
Regards

Bachelor of Computer Applications is good if you are interested. And b.sc is also good.

both are good courses.But in India there are a few colleges which provide bs research.

There will be entrance test conducted by university for merit seats. For getting admission under management quota, please contact admission officer