Assoc. Professor Margarita Pesheva is the leader of the Laboratory of microbial genetics at the Department of Genetics, Sofia University. She received her M.Sc. From Sofia University, Bulgaria and Ph.D. From the University of St. Petersburg, Russia. Dr. Pesheva gives lectures and practical exercises in Genetics, specifically Bacterial Genetics and Genetics and selection of microorganisms. During the last years, the scientific interests of Dr. Pesheva have focused on construction of yeast strain Saccharomyces cerevisiae with gene modified Ty1 retro-transposon. Dr. Pesheva is the co-author of “Tool for Quantitative Determination of Antioxidant Activity of Different Natural Products in Alive Cells”.