Sugars

Question 1

What is the name of the bond that forms between two monosaccharides?

Answer 1

Glycosidic bond

Question 2

What molecule is released during a condensation reaction between two monosaccharides?

Answer 2

Water

Question 3

Which monosaccharides make up the disaccharides:
a)maltose
b)sucrose
c)lactose

Answer 3

a)glucose and glucose
b)glucose and fructose
c)glucose and galactose

Question 4

Describe how to test for reducing sugars and say what a positive and negative result would look like.

Answer 4

Add Benedict’s reagent to a test sample and heat it in a water bath to bring to a boil. Look at the colour of the sample for the result. A positive result would be a coloured precipitate (green, orange, yellow or brick red, depending on the concentration of the reducing sugars) and a negative result would be blue.