This is the thoroughly revised, updated, and enlarged edition of the book. This book has its origin in the analysis of the questions being asked in the examinations conducted by ASRB for ARS, ICAR-JRF/ SRF/NET, UGCNET, SAUs/CATET, UPSC, PCS, ICMR, CSIR, NAARM, DBT, NDRI, IARI/IVRI, JNU, BHU, Thsti and various agricultural universities. This book is an attempt to provide necessary guidance to the students of biotechnology in preparing for different competitive examinations. The majority of the questions given in this book have been designed to assess the candidate's understanding of the subject. The book contains more than 7000 scientifically constructed multiple-choice questions. This is an endeavor to present currently relevant questions in a user-friendly systematic manner, which will give the readers an idea about the model questions and help them to be focused. The book will serve as an efficient tool to prepare for various competitive examinations.Salient features of the bookA whole lot of objective-type questions with their solutions.A new enriched section on data interpretation.Questions from recent years' examination papers (compiled on a memory basis) have been incorporated.Model papers for different examinations.For complete understanding, units have been divided into individual chapters and each chapter is supplemented with a sufficient number of multiple-choice questionsThis is the only book with previous years solved papers