In this animated object, learners examine the formation of peptide bonds through dehydration synthesis.

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 the formation of ester bonds in the synthesis of lipids using triglyceride biosynthesis as an example. Ester bond formation is described as a dehydration synthesis reaction.

In this animated object, learners examine how changes in pH affect the salt bonds in strands of hair.

In this animated lesson, learners read about the disulfide bond, the second strongest chemical bond in the hair. This bond can only be altered by chemicals.

In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."

In this animated object, students examine what happens when electrons share molecules.

In this screencast, learners examine the properties of the hydrogen bond and how the bond changes when hair is shampooed or styled.

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