Biology · May / June 2023 · Paper 42 · Question 7
0610
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Complete the sentences about enzymes by writing a suitable word or phrase in each of the spaces provided. Enzymes are involved in chemical digestion which produces small molecules that can be absorbed into the blood. Two examples of protease enzymes are pepsin and trypsin. Pepsin is produced by the and requires acidic conditions. These conditions are created by the release of , which provides the optimum pH for pepsin activity and also kills harmful . The produces trypsin which breaks down protein in pH conditions. These conditions are created by a substance called , which neutralises the gastric juices and also has an important role in the of fats and oils. [8]
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soluble ;
stomach ;
hydrochloric acid ;
(named) microorganisms / pathogens ;
pancreas / small intestine ;
alkaline ;
bile / bile salts ;
emulsification ;
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