Polysaccharides

Question 1

Description of maltose:

Answer 1

Made of 2 alpha glucose, and produces maltose, bonded with a glycosidic bond (at the shared oxygen) and H2O.
Molecular formular is C12H22O11
It is a disaccharide.

Question 2

Description of sucrose:

Answer 2

Made of 1 alpha glucose and 1 fructose, produces fructose bonded with a glycosidic bond (at the shared O2) and H2O.
Molecular formular is C12H22O11
It is a disaccharide.

Question 3

Condensation reactions:

Answer 3

When they occur between monosaccharides to form a disaccharide, water is released.

Question 4

Glycosidic bond:

Answer 4

When sugar units condense, the bond between them at the OXYGEN is a glycosidic bond.

Question 5

Alpha glucose + Alpha glucose –>

Answer 5

Maltose + water

Question 6

Alpha glucose + fructose –>

Answer 6

Sucrose + water

Question 7

Alpha glucose + galactose –>

Answer 7

Lactose + water

Question 8

Hydrolysis reactions:

Answer 8

Disaccharides can be broken down by adding water - hydrolysis - which shows it is a reversible reaction.