JIPMER exam is quite different from NEET, and needs more time management and in-depth knowlwdge. 

The pattern of the exam goes like this,

Total number of marks and questions = 200

Physics = 60

Chemistry = 60

Biology = 60

English language and Comprehension = 60

Logical and Quantitative Reasoning = 60

Each correct answer carries 1 mark and there is no negative marks for wrong answers. 

The exam is for 150 minutes (2.5 hours) and thus needs a time-management. 

The standard of the paper is quite high and needs in-depth knowledge. Thus, being thorough with the NCERT books is not enough for the exam. 

Some of the best study materials are, 

1. For physics, you can go for HC Verma and GRB Objective Physics. Or any other book for objective Physics, like 'Errorless'.

2. For Chemistry, stick on to Modern's ABC of Chemistry as it cover all the concepts in depth and for the organic part, make sure you practice a lot. MS Chauhan's Organic Chemistry would help.

3. For Biology, the best book you can go for is Trueman's Elementary Biology. It has in-depth theory. 

Begin your preparation early, as delayed start in preparation would make it even difficult. 

The applications for the examination is of online mode, and would start around the first week of March every year and would extend till the mid of April. 

All The Best.