This book has resulted a very appreciated help for university students to successfully pass multiple choice question based biochemistry exams, which are the most common way of being assessed in subjects as General Biochemistry, Medical Biochemistry and other biosciences courses given at many universities throughout the world. For the student facing such exams, the fact of 'having understood and memorized' all the contents is not enough. It is crucial to practice repeatedly the exercise of searching in the memory for the proper answer, distinguishing it from very similar options, specifically designed for inducing to error. Facing to these situations again and again before the exam will reinforce your memory ability and will surely improve your grade. The 1000 questions are put into 19 content blocks. Within these blocks, to simulate the exam conditions, I have not made any additional order (apart from sugar or lipid metabolism, and photosynthesis). Each block must be addressed after a thorough study of the contents found in the indicated reference books or the ones given by your teachers. I have prepared the questions in the same way that I prepare the exams for my students. They are the fruit of a methodical and exhaustive review of the indicated bibliography, and they cover from the most obvious aspects to the trickiest ones, with the pursuit of 'leaving nothing without being asked'. Surely the teachers will also find good ideas on 'what and how to ask' for these blank evenings preparing the proof. Some technical issues: i) I have chosen a 5-options model (very common in many universities). You must know that this option entails that a mistake subtracts 0.25 right answers. ii) when a right answer is included in a more general answer, that is also right, the valid option is the last one. About me. I got my PhD in Biology at the University of Barcelona (Spain). I am specialized in macromolecular structure, molecular simulation, bioinformatics, computational biochemistry, drug design, ... I combine (when it is possible ) the teaching at a secondary school with university teaching. I have been assistant professor of Biochemistry at the University of Barcelona and the University of Castilla-La Mancha. You can send me at joseramonblas@gmail.com any doubt arisen from the work with the book, that I will be very glad to answer. I hope it improves your grade and your learning."