(a)[3]
The left-hand box contains the word ‘Enzymes’. The boxes on the right-hand side each contain a sentence ending. Draw lines to form three correct statements about enzymes.
(b)[2]
State the substrate on which protease enzymes act and the name of the products produced.
(c)[3]
Fig. 1.1 shows how the activity of a protease enzyme changes at different pH values. Describe the enzyme activity shown in Fig. 1.1.
(d(i))[1]
Circle the organ that secretes protease. Options: gall bladder, pancreas, rectum, salivary gland.
(d(ii))[1]
Circle the organ where protease acts. Options: large intestine, mouth, oesophagus, small intestine.
(e)[2]
Describe two roles of hydrochloric acid in the stomach.
(f)[1]
Describe the stomach’s function in physical digestion.