Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.

Students read about the process of hair growth beginning with the joining together of amino acids.

In this screencast, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

In this animated object, learners examine neutral fats, phospholipids, and cholesterol. The molecular formula and general function for each are shown.

In this animated object, learners read an introduction to protein structure and function.

In this animated object, learners examine neutral fats, phospholipids, and cholesterol. The molecular formula and general function for each are shown.