AQA Chapter 2.3

Question 0

What is the reaction involved in joining two monosaccharides together and what are the products?

Answer 0

It is a condensation reaction. Two monosaccharides form one disaccharide and a water molecule.

Question 1

How are disaccharides formed?

Answer 1

Disaccharides are formed when two monosaccharides are joined together by a glycosidic bond.

Question 2

What are the constituent molecules of maltose?

Answer 2

Glucose and glucose

Question 3

What are the constituent molecules of sucrose?

Answer 3

Glucose and fructose

Question 4

What are the constituent molecules of lactose?

Answer 4

Glucose and galactose.

Question 5

What is the reaction involved in breaking disaccharides and what are the products?

Answer 5

It is a hydrolysis reaction. One disaccharide and one water molecule makes two monosaccharides.

Question 6

What is the difference between an alpha and a beta glucose?

Answer 6

In an alpha glucose, the hydroxide group bonded to carbon 1 is above the carbon. In a beta glucose, the hydroxide group is below the carbon 1