Monosaccharide common exaples

Question 1

Sugars can be classified as reducing or non-reducing; this classification is dependent on their ability to ……

Answer 1

Donate electrons

Question 2

Reducing sugars can

Answer 2

donate electrons (the carbonyl group becomes oxidised), the sugars become the reducing agent

Question 3

How can reducing sugars be detected

Answer 3

Thus reducing sugars can be detected using Benedict’s test as they reduce the soluble copper sulphate to insoluble brick-red copper oxide

Question 4

Examples of reducing sugars include:

Answer 4

glucose, fructose and galactose

Question 5

Fructose and galactose have the same molecular formula as glucose however they have a different structural formula
The different arrangement of atoms in these monosaccharides gives them

Answer 5

slightly different properties

Question 6

Non-reducing sugars can … electrons

Answer 6

cannot donate electrons, therefore they cannot be oxidised

Question 7

To be detected non-reducing sugars must

Answer 7

first be hydrolysed to break the disaccharide into its two monosaccharides before a Benedict’s test can be carried out
Example: sucrose