Page 06 8. An investigation was carried out to determine the effect of lead ion concentration on the activity of the enzyme amylase. The results are shown in the table. Lead ion concentration (mol l−1) Amylase activity (% of control) 0·0 (control) 100 0·1 84 0·2 23 0·3 11 0·4 2 0·5 0 A conclusion that can be drawn from these results is that inhibition was A highest at high lead ion concentrations B highest at low lead ion concentrations C lowest at lead ion concentration 0·5 mol l−1 D highest at lead ion concentration 0·1 mol l−1. 9. ATP is recycled to transfer energy within cells. The diagram shows two reactions involving ATP. Reaction 2 ATP ADP + Pi Reaction 1 Which row in the table describes Reaction 1 and Reaction 2? Reaction 1 Reaction 2 A catabolic and energy released anabolic and energy required B anabolic and energy released catabolic and energy required C catabolic and energy required anabolic and energy released D anabolic and energy required catabolic and energy released