(a)[3]
Describe the hydrogen bonding present between the water molecules shown in Fig. 2.1.
(b)
The human enzyme, salivary amylase, consists of one polypeptide. Fig. 2.2 shows the structure of a salivary amylase molecule.
(b(i))[1]
Explain the role of hydrogen bonding in keeping the secondary structure of proteins, such as salivary amylase, intact.
(b(ii))[2]
Explain the role of hydrogen bonding in keeping the tertiary structure of proteins such as salivary amylase intact.
(c)[3]
Outline the role that water plays as a solvent in plants.