This third edition of Catch up Compendium contains the most up-to-date editions of the three existing Catch Up books: Biology, Chemistry and Maths & Stats. It provides over 600 pages of background material essential for any student studying courses in the biological and biomedical sciences. The book provides a bridge between school and university courses and provides invaluable support for the fundamental concepts covered during first year university modules. Catch Up Compendium is a unique combination: course book, revision guide, and reference source - your first year studies will be much easier with a copy by your side.