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

In this learning activity you'll review how every protein molecule of an organism is synthesized by that organism in a prescribed process. This activity helps students understand the fundamental life process of making protein.

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 read an introduction to protein structure and function.

In this animated object, learners compare the mode of action of steroids with the action of amino acid-based hormones.

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

In this video, you'll review how every protein molecule of an organism is synthesized.

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