Whenever a student decides to prepare for any examination his/her first and foremost curiosity is to know about the type of questions that are expected in the exam. This becomes more important in the context of competitive entrance examinations where there is neck-to-neck competition. We feel great pleasure in presenting before you this book containing Error Free Chapterwise Solutions of CBSE AIPMT/NEET Biology Questions from the years 1988 to 2020.