NCERT textbooks can prove to be beneficial for the UET exam. The major concepts which are asked in the exam can be covered through it. However, for the exam practice, various sample papers can help in building strategies for the exam. More and more questions help in thinking about the concepts and applying them with speed and accuracy. Building up accuracy will surely fetch a perfect score.
All the best!!!
This is one of the best preparation books.
BHU Banaras Hindu University B.Sc Bio Group Entrance Exam 2019 with Solved Paper
Read your 11 th and 12 th NCERT or any board book and solve atleast 10 years paper of (http://b.sc/) bio entrance. This will be more than sufficient to crack the entrance exam with good rank.
Hope this helps