This book aims to help you understand the modern data of molecular biology and biotechnology, to be your ally in studying and to provoke your critical thinking. It also aims to help you prepare for the exams of the 3rd grade of the general high school of the science direction.

The book follows the structure of the school book, examining each chapter divided into small units.

Each unit contains:
1. Basic theory questions with answers
2. Basic solved exercises
3. Questions to answer, including:
- Multiple choice questions
- True or false questions
- Fill in the blank questions
- Theory-critical questions
- Exercises-problems.

At the end of each chapter, there is a unit with review questions and tests. Also, after chapter 5 and after chapter 9, there are review tests that concern broader units of the school book.

We believe that, after completing the study of each chapter and the review questions and answers to the issues of the accompanying tests, as well as the review tests, you will be able to meet the requirements of the exams.

The exam questions included in the questions to answer are from the May-June exams, September exams, June review exams (patients), and evening high schools.

At the end of the book, there are answers for all the questions to answer, as well as the answers to all the questions and exercises of the school book.