3.1.2 Carbohydrates

Question 1

Name three monosaccharides?

Answer 1

Glucose , Fructose , Galactose

Question 2

What are the word equation for Maltose?

Answer 2

Glucose + Glucose ——> maltose + water

Question 3

What is the word equation for Sucrose?

Answer 3

Glucose + Fructose ——> Sucrose + Water

Question 4

What is the word equation for Lactose?

Answer 4

Glucose + Galactose ——> Lactose + Water

Question 5

What is Starch made up of?

Answer 5

Amylose and Amylopectin

Question 6

Describe Amylose?

Answer 6

-Straight chain of alpha glucose
- 1,4 Glycosidic links
-Helical structure

Question 7

Describe Amylopetin

Answer 7

-Polymer of alpha glucose with side branches
-1,6 Glycosidic links

Question 8

What is the test for starch?

Answer 8

-Place 2cm^3 of the sample being tested into a test tube
- Add two drops of Iodine solution and stir
-The presence of starch is indicated by a blue-black coloration

Question 9

Describe Cellulose?

Answer 9

-Dietary Fibre
-Straight chain
-Made from Beta glucose monomers
-held together by H-bonds between molecules
-Form microfibres which form fibrils which provide strength at a perpendicular angle

Question 10

Describe Glycogen?

Answer 10

-Storage in animals,fungi and bacteria
-made from alpha glucose
-Branched giving easy access to stored energy
-1,4 and 1,6 Glycosidic bond