(a(i))[4]
Using Fig. 2.1 as a guide, compare the findings for cotton and false flax.
(a(ii))[3]
Suggest possible explanations for the differences displayed in Fig. 2.1.
(b)[3]
Rubisco enzymes from cotton and false flax remain active at temperatures up to $45^\circ\text{C}$ and denature at $45^\circ\text{C}$. Explain how the Calvin cycle is affected when rubisco denatures.
(c)[2]
One aim of genetic engineering is to produce crops that are heat tolerant, so that they can grow and give a good yield at high environmental temperatures. Use the information in Question 2 to suggest and explain one method of improving a crop’s tolerance to high temperatures.
(ii)[3]
Suggest possible explanations for the differences displayed in Fig. 2.1.