1) Name the enzyme that digests starch in the human digestive system a) amylase b) protease c) lipase 2) Where are most food molecules absorbed? a) large intestine b) liver c) small intestine d) stomach 3) Which type of enzyme is produced in the stomach? a) carbohydrase b) lipase c) protease 4) Which organ is the stomach?  a) A b) B c) C d) D 5) Which term describes the pH in the stomach? a) acidic b) alkaline c) neutral 6) Which organ produces bile? a) large intestine b) liver c) mouth d) pancreas 7) How does bile help in the digestion of foods? a) It increases the surface area of fats b) It is an enzyme that digests proteins c) It makes the pH in the small intestine acidic 8) Which organs in the human digestive system produce amylase? a) liver, small intestine and large intestine b) salivary glands, stomach and liver c) salivary glands, pancreas and small intestine d) stomach, pancreas and large intestine 9) What is protein broken down into? a) amino acids b) fatty acids c) glucose d) glycerol 10) Which organs in the human digestive system produce protease?  a) gall bladder, small intestine and large intestine b) stomach, liver and small intestine c) stomach, pancreas and small intestine d) stomach, small intestine and large intestine 11) What is the name of the enzyme which breaks down starch to produce sugars? a) amylase b) bile c) lipase d) protease 12) Which two products are formed when lipids are broken down? a) amino acids b) fatty acids c) glucose d) glycerol e) glycogen 13) Which formula shows glucose? a) C6H12O6 b) CO2 c) H20 d) O2 14) Which type of enzyme breaks down starch? a) Carbohydrase b) Lipase c) Protease 15) What are enzymes made from? a) proteins b) carbohydrates c) lipids / fats 16) Where is protein digested in the human digestive system? a) small intestine and large intestine b) pancreas and small intestine c) stomach and small intestine d) mouth and stomach  17) What are proteins made of? a) amino acids b) fatty acids c) glucose  d) starch 18) What is the part of the enzyme where the substrate binds called? a) active site b) products c) enzyme-substrate complex 19) At high temperatures or if the pH is too low or high the enzymes active site changes shape so the substrate can no longer fit. What has happened to the enzyme? a) died b) denatured  20) What is digestion? a) The process by which smaller soluble food molecules are absorbed into the blood  b) The process of transporting food from the mouth to the anus c) The breakdown of large food molecules into smaller molecules that can be absorbed into the blood 21) Where is bile stored in the human digestive system? a) liver b) stomach c) gall bladder d) small intestine 22) Which type of enzyme breaks down fats? a) protease b) lipase c) amylase

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