Carbohydrate digestion

Question 1

1. Enzyme
Enzyme group /subclass :
Substrate:
Action mechanism:
Potential products:

Answer 1

Enzyme: Salivary a- amylase
Enzyme group/subclass: Glycosidase/ Endoglycosidase
Substrate: Starch and Glycogen
Action mechanism:
Hydrolysis of a1-4 glycosidic bond
Potential products:
Dextrins, maltotriose, maltose, isomaltose

Question 2

2. Enzyme
Enzyme group/subclass:
Substrate:
Action mechanism:
Potential products:

Answer 2

Enzyme:Pancreatic a-amylase
Enzyme group/subclass:
Glycosidase/ Endoglycosidase
Substrate: Starch and Glycogen
Action mechanism: Hydrolysis of a1-4 glycosidic bond
Potential products:
Dextrins, maltotriose, maltose, isomaltose

Question 3

3. Enzyme 
Enzyme group/subclass:
Substrate:
Action mechanism:
Potential products:

Answer 3

Enzyme: Glucoamylase
Enzyme group/subclass:
Glycosidase/ Exoglycosidase
Substrate: Oligosaccharides, dextrins, maltotriose and maltose
Action mechanism:
Hydrolysis of terminal a1-4 glycosidic bonds at nonreducing end
Potential products: Shorter oligosaccharides, glucose

Question 4

4. Enzyme
Enzyme group/subclass:
Substrate:
Action mechanism:
Potential products:

Answer 4

Enzyme: B- glycosidase complex
Enzyme group/subclass: Glycosidase/ Exoglycosidase
Substrate: lactose, cellbiose, glycosyl-b-ceramides
Action mechanism: Hydrolysis of b1-4 glycosidic bond
Potential products: glucose and galactose

Question 5

5. Enzyme 
Enzyme group/subclass:
Substrate:
Action mechanism:
Potential products:

Answer 5

Enzyme: Sucrase-isomaltose complex
Enzyme group/subclass: Glycosidase/ exoglycosidase
Substrate: Dextrins, Maltose, Maltotriose, isomaltose, Sucrose
Action mechanism: Hydrolysis of a1-2, a1-4 and a1-6 glycosidic bonds
Potential products:
glucose, fructose, shorter oligosaccharides

Question 6

6. Enzyme 
Enzyme group/subclass:
Substrate:
Action mechanism:
Potential products:

Answer 6

Enzyme: Trehalase
Enzyme group/subclass: Glycosidase/ Exoglycosidase
Substrate: Trehalose
Action mechanism: Hydrolysis of a1-1 glycosidic bond
Potential products: Glucose

Question 7

7. Enzyme 
Enzyme group/subclass:
Substrate:
Action mechanism:
Potential products:

Answer 7

Enzyme: Nucleosidase

Enzyme group: Glycosidase
Substrate: Nucleoside
Action mechanism: Hydrolysis of N-glycosidic bond
Potential products: Pentose ( Ribose or deoxyribose): purine and pyrimidine base