This extremely challenging content is easily explained in the OCR Biology A level Sliding Filament Theory Booklet It includes : Skeletal muscle Histology The structure of the myofibril The structure of a sarcomere How the muscle contracts -sliding filament theory How contractions change the pattern of banding Maintenance of ATP

This resource booklet explores the Biological importance of water to life and how the key biochemical properties of water enable life to exist on our planet.

This Booklet covering the main four structures and levels of proteins from the primary level with Amino acids structure and properties to the Quaternary level with Collagen and Heamoglobin

This A level Booklet resource contains all the vital information needed on the evolution and formation of new species. The booklet is designed to be filled in with the class as you teach them about the two main mechanisms of Allopatric and Sympatric Speciation The booklet introduces Demes and the idea of reproductive isolation and Genetic drift. It then goes into the main types of speciation: Allopatric and Sympatric speciation with some very clear and easy to understand examples. The booklet finishes on other sympatric speciation mechanisms such as Ecological, Temporal and Mechanical isolation.

This introduction to Biological molecules looks at the key chemical groups found in living molecules a long with the basic summary of all the key Biological molecules found in living organisms