M.Sc

Yes, M.Sc in nursing will help you a lot. Go for it.

In which field did you complete your B.Sc?

After completing B.Sc, you could apply to institutes offering courses in M.Sc. Please check the eligibility criteria and admission process of different institutes online. You can do this by downloading the admission brochure of different institutes. This should give you a fair idea of what is required of you to pursue M.Sc.

Job opportunities and careers available to you after completing graduation in B.Sc are as follows:
1) Medicine
2) Clinical psychologist
3) Neuro-physicist
4) Research scientist
5) Food scientist
M.Sc after B.Sc is a good combination and will open up many more avenues and career options.

You could take up a number of courses after completing B.Sc in Biology. Some of the subjects you could pursue after completing your course in Biology are as follows:
1) Master of Science in Biology
2) Master of Science in Biological Sciences
3) Master of Science in Applied Biology
4) Master of Science in Environmental Biology
5) Master of Science in Environmental Microbiology
These are only a few subjects you could pursue in M.Sc. from a much broader pool of subjects. I am certain that if you do well in your studies, you will get a respectable package in the industry.

Some of the better colleges to pursue M.Sc in maths through distance learning are as follows:
1) Bangalore University
2) Guru Nanak Dev University
3) IGNOU
4) Madras University
5) University of Mumbai

Yes, you can go for M.Sc, but I would suggest that you should go for M.Tech that is a better option.
Good luck.

Go through the link to know about the details: http://www.bits-pilani.ac.in/university/wilp/wilpoverview.