(a)[3]
Complete the table by putting a tick (✓) in the suitable column to show the process in which each substance may be used.
(b)[4]
Proteins and DNA each have different helical arrangements. Briefly describe the bonding that keeps the shape of each of these helical structures intact.
(c)[3]
Describe how bonding differs between the primary and tertiary structures of proteins. Your answer should refer to both the type of bonding and the classes of amino acid responsible for it.