This broad course encompasses several themes in biology, for example the structure of molecules, the formation of proteins, bacteriology, enzymatic activity and functioning and others. This course is specifically aimed at university students who specialize in medicine, pharmacy, biochemistry, food, nutrition and others. Our session will be distributed as follows: - first part: revisions or recapitulation of the course. - second part: practice in the form of exercises or scientific articles or complex tasks. - third part: a small homework will be entrusted to you in order to ensure that the notions have been well acquired. You can also send me all your questions, as I can be present with you during your online assessment.