Enzymes and secretion

Question 1

what food substance does the enzyme salivary amylase act upon?

Answer 1

carbohydrates

Question 2

what food substance does the enzyme pepsin act upon?

Answer 2

proteins

Question 3

what food substance does the enzyme peptidase act upon?

Answer 3

peptides

Question 4

what food substance does the enzyme lactase act upon?

Answer 4

lactose

Question 5

what food substance does the enzyme lipase act upon?

Answer 5

fats

Question 6

list three types of secretions produced by different cells lining the gastric pits

Answer 6

hydrochloric acid, mucus and pepsin

Question 7

the role of the secretion of hydrochloric acid in digestion

Answer 7

allows pepsin to act

Question 8

the role of the secretion of mucus in digestion

Answer 8

creates a protective lining on the stomach

Question 9

the role of the secretion of pepsin in digestion

Answer 9

involved in the digestion of proteins

Question 10

what are two factors that could have led to the substrate being unable to bind to the enzyme?

Answer 10

• cofactors/ co-enzymes are absent. eg vitamins are absent

- wrong enzyme for the substrate