Digestive Enzymes

Question 1

What enzymes are found in the mouth?

Answer 1

Salivary amylase

Question 2

What enzymes are found in the stomach?

Answer 2

• Hydrochloric acid
• Pepsin

Question 3

What enzymes are found in the duodenum?

Answer 3

• pancreatic amylase
• pancreatic lipase
• trypsin

Question 4

What enzymes are found in the small intestine?

Answer 4

• lactase
• maltase
• sucrase-isomaltase
• peptidase

Question 5

Pepsin

Answer 5

Pepsin’s optimum pH is acidic, hence it is the only enzyme that works in the pH2 environment of the stomach due to HCl acid.

Question 6

Enzymes in the body

Answer 6

Enzymes are affected by temperature, which does not need to be controlled as it is constant throughout the body, and pH, which is different throughout the digestive system (eg. stomach is pH2).

Question 7

What are the carbohydrases?

Answer 7

Amylase, sucrase-isomaltase, maltase, lactase

Question 8

What are the proteases?

Answer 8

Pepsin, trypsin, peptidase

Question 9

What are the lipases?

Answer 9

Lipase

Question 10

Draw the shape of a carbohydrate molecule

Answer 10

N/a

Question 11

Draw the shape of a protein molecule

Answer 11

N/a

Question 12

Draw the shape of a lipid molecule

Answer 12

N/a

Question 13

Starch breakdown

Answer 13

Starch -(Mouth or Duodenum, Amylase)-> Maltose -(Small intestine, Maltase)-> Glucose

Question 14

Protein breakdown

Answer 14

Protein -(Proteases)-> Amino Acids

Question 15

Lipid breakdown

Answer 15

Lipids -(Duodenum, Lipases)-> Fatty acids + Glycerol