The book is constructed in a scientific manner considering the fact that the previous years' questions are not repeated but the concepts are. We have taken a judicious approach to filter out previous years' questions. Then we have identified the areas from where previous years' questions are most often asked. Finally, we have considered each of these selected questions as a template and subsequently framed two replicate questions (Replicate 1 and Replicate 2) with similar concepts as done in DNA Replication! In this way, the entire previous years' questions of CSIR NET Life Sciences are now replicated. This approach is adopted for all the thirteen units of the CSIR NET Life Sciences.We have replicated both Part-B (CSIR 2 marks) and Part-C (CSIR 4 marks) category questions. This brand-new idea of the book will offer a cluster of questions on a prescribed syllabus. The most crucial part of the book is the complete explanation of all the replicated questions. It forms the true strength of the book.