The book deals with objective type questions and answers in the respective stream. The book is aimed to provide a rich selection of questions related to almost all the major aspects of the biochemical engineering biochemistry biotechnology and microbiology. Efforts have been made to cover wide range of topics in accordance with the syllabi of various competitive examinations. The book contains about four thousand questions on various aspects. It is hoped that the book will be very useful to the students of biochemical engineering biochemistry biotechnology microbiology and allied streams who can prepare themselves for both written as well as oral examinations. At the same time this can be used as a readily available handbook for quick reference by students and practising scientists technologists and engineers.