Digestion of Carbohydrates by Amylases and Membrane-bound Disaccharidases

Question 1

The digestion of carbohydrates takes place in the

Answer 1

The digestion of carbohydrates takes place in the mouth and the small intestine

Question 2

What hydrolyses starch and what does it turn into

Answer 2

Amylase is a carbohydrase that hydrolyses (breaks down) starch into maltose

Question 3

Maltose is then hydrolysed into …………….

by what enzyme

Answer 3

alpha glucose glyosidic bond between disaccharides broken

hydrolysed into glucose by the enzyme maltase

Question 4

Amylase is made in the

Answer 4

Amylase is made in the salivary glands, the pancreas and the small intestine

Question 5

Maltase is a ………….which is found in

Answer 5

membrane bound disaccharidase

duodenum and ileum

Question 6

There are also other membrane bound disaccharidases in the duodenum and ileum

Answer 6

sucrase and lactase, that hydrolyse sucrose and lactose respectively

Question 7

the hydrolysis which is catalysed by the disaccharidases allows for

Answer 7

This allows the absorption of monosaccharides into epithelial cells of the small intestine which pass them into the blood stream

Question 8

Small intestine is folded and there are microvilli present.
This increases

Answer 8

the surface area substantially, allowing more membrane-bound disaccharidases to fit into the membrane and more absorption to take place