11. Explain why starch needs to be broken down into glucose during digestion. 12. Explain the role of enzymes in the digestion process. 13. Harry set up an experiment to investigate the burning of carbohydrates. His results are shown below. a) Which carbohydrate, starch or sucrose, released the most heat energy? b) Harry used the same volume of water in each experiment. Suggest another variable which would have to be kept the same to make a fair comparison. c) Animals and plants obtain energy by breaking down carbohydrates. Name this process. 14. A pupil set up the apparatus shown to investigate the rate of photosynthesis. Oxygen gas was produced by the plant was collected in the test tube.
11. Explain why starch needs to be broken down into glucose during digestion. 12. Explain the role of enzymes in the digestion process. 13. Harry set up an experiment to investigate the burning of carbohydrates. His results are shown below. a) Which carbohydrate, starch or sucrose, released the most heat energy? b) Harry used the same volume of water in each experiment. Suggest another variable which would have to be kept the same to make a fair comparison. c) Animals and plants obtain energy by breaking down carbohydrates. Name this process. 14. A pupil set up the apparatus shown to investigate the rate of photosynthesis. Oxygen gas was produced by the plant was collected in the test tube.