Proteins are known as condensation polymers. Write a balanced equation for the condensation reaction between two glycine molecules, $\text{H}_2\text{NCH}_2\text{CO}_2\text{H}$.
Draw the skeletal formula of the organic product.
X-ray analysis has revealed that many proteins contain sections with a regular arrangement within the polypeptide chain. This is called secondary structure and it occurs in two main forms. State the two forms of secondary structure found in proteins.
Draw a diagram to show one form of secondary structure.
There are about 20 common amino acids in humans, and most of them share the same general structure:\n\n$\text{H}_2\text{NCH(R)CO}_2\text{H}$.\n\nThe identity of the $R$ group determines which bonds can form as the protein’s secondary structure folds further to produce tertiary structure. Complete the table to show the type of tertiary bonding that is likely to arise from each pair of amino acid residues.