Science

The good reference books for the IIT JAM mathematics are given below:
Books on Algebra
Fundamental structure in Modern Algebra by R.S. Mishra and N.N.Bhattacharya
Abstract Algebra by Bhattacharya, Jain & Nagpal
Linear Algebra for IIT JAM Mathematics by Samveda publication
Books on Calculus
Integral Calculus by Gorakh Prasad
Calculus by M. J. Strauss, G. L. Bradley and K. J. Smith
Calculus by Pisknov
Books on Real Analysis
Introduction to Real Analysis by R. G. Bartle and D. R. Sherbert
A course of Mathematical Analysis by Shanti Narayan
Fundamentals of Real Analysis by V.K Krishnan
Books on Differential Equations
Differential Equations by G.F.Simmons
Partial differential equationsmethods and applications by Mcowan, R.C
Books on Group Theory
Group Theory by Sudesh Kumar Shah
Books for Vector Analysis
Vector Analysis: Schaums Outlines Series
For practicing purpose, you can take help of IIT-JAM: M.Sc. (Mathematics) Previous Papers & Practice Test Papers (Solved) by by RPH Editorial Board (Author).

There are various options available for you after getting Microbiology degree.
You can choose to stay in education and pursue a Master's degree or Ph.D in microbiology. Whereas, you can decide to enter into job market after graduation degree.
You can work in both, government as well as in private sectors. Microbiologists are mostly demanded in UK, US, France, Australia and Germany.
With a degree in microbiology, you can get opportunities in various fields like healthcare organizations, forensic science laboratories, environmental organizations, higher education institutions, food and drink, publicly funded research organizations, pharmaceuticals and many other industries.
In the medicine and health care field, your work is usually associated with prevention & treatment of illnesses linked with microbes.
Various universities & institutions employ microbiologists as teachers & researchers.

Eligibility for M.Sc in Astrophysics:
The minimum eligibility required for admission for the course is, the candidate must have completed graduation with science from a recognized university with a minimum aggregate score of 50%.
A few universities and colleges in India conduct entrance examinations for admission for the course.
M.Sc in Astrophysics: Admission Process:
Admission for the course is conducted in 2 stages:
Institutional Test.
Personal Interview- involving assessment of fitness, work experience, publications and statement of purpose. Most colleges admit students for the course on the basis of their performance in the relevant entrance test. Some institutions/ universities conduct their own entrance tests for offering admission. The admission process may vary from college to college.
M.Sc in Astrophysics: Academic Options:
Upon successful completion of the course, successful postgraduates interested in higher studies in the discipline may go for pursuing M.Phil./ PH.D. in the subject.