There are 2 ways of verifying learning: The first, for attending students, 4 written tests in itinere each time to check the knowledge acquired with regard to 1/4 of the program performed. Each test consists of 3 questions with free answers to be played in 15 minutes (grade out of thirty, weight of each test equal to 0.25). The second, students can opt for a single final test that concerns the verification of learning the basic themes of molecular biology. This is a written test with 12 free questions to be answered in 1 hour (vote out of thirty). In no case, an oral supplementary test is required to increase the mark of the written tests.