Hello Reddi Dhanalakshmi!

First of all, keep following your BSc notes religiously because it is going to help you a lot. You must know that only questions related to microbiology is not asked in the entrance exam for microbiology. There are questions related to genetics, biochemistry(mainly) and ecology also.

However, I am providing you with google drive links of the most important books that you must go through for clearing your fundamentals( Can not tell the names of the books as it is against the community guidelines. But once you download the e-books you will know).

https://drive.google.com/file/d/1wGtcQUrkOjv04tInWbNMMsDz_8avXXDz/view?usp=drivesdk

https://drive.google.com/file/d/1wOHBvGQV8LUJ45LCAWU5DfBrKTMdekHW/view?usp=drivesdk

If you want faster revision in a short period of time, then the e-books below are the best for you! The links for the same are given below:-

https://drive.google.com/file/d/1vz1iCOIAigp53gzKTInNItd4BJmW1ZDe/view?usp=drivesdk

https://drive.google.com/file/d/1vw6bDlIMgNBa4O7DOyQ_im2tKeMHE-Zc/view?usp=drivesdk

(Copy and paste all the links in your browser one by one to download the e-books)

All the best for your preparation!