(a(i))[3]
Cellulose is the principal polysaccharide found in plant cell walls. Describe the structure of cellulose.
(a(ii))[1]
State one visible feature in Fig. 3.1, apart from the cell wall, that shows the cells are plant cells.
(a(iii))[3]
Outline ATP’s role in a leaf cell.
(b)[2]
Fig. 3.2 shows two water molecules joined by a hydrogen bond. Explain how hydrogen bonding forms between water molecules.
(c)[2]
Suggest why water is a very good solvent for ions.