Understanding Biochemistry is a free, open-access, online resource produced by The Biochemical Society. It is a series of simple texts, published as part of the Essays in Biochemistry series, aimed at senior high-school and undergraduate students, and their teachers. They can be read online or downloaded as pdfs from the Portland Press web site:
https://portlandpress.com/essaysbiochem/pages/understanding_biochemistry
The articles (available in English) are written and illustrated to make them easily understandable by students, providing up-to-date overviews of key concepts in biochemistry and molecular biosciences.
The following are available (as of February 2021) but other titles may be produced in the future:
Enzymes: principles and biotechnological applications
Essential chemistry for biochemists
The biochemical basis of disease
Structure and function of nucleic acids
