(a)[3]
Complete Table 7.1 using the letters A, B or C from Fig. 7.1 to show where the following compounds linked with photosynthesis in C4 plants are located. You may use A, B and C once, more than once, or not at all. Compounds: - PEP carboxylase - RuBP - rubisco
(b)[2]
Explain why the cells in C are arranged in a close ring around the cells in B.
(c)[3]
Some enzymes are involved in the light independent stage of photosynthesis. Fig. 7.2 shows the activity of one of these enzymes at a range of temperatures for a C3 plant, Pisum sativum, and a C4 plant, Amaranthus hypochondriacus. Describe the differences between the two curves and suggest explanations for these differences.