GCSE Food

?
  • Created by: Bonnie
  • Created on: 31-05-14 14:31
Starch
heated in liquid, walls become soft, allow liquid to pass slowly, granules swell (gelatinisation)
1 of 15
Gelatinisation
-starch particles do not dissolve in liquid (suspension) -if not stilled, granules sink to form lumps -heated at 60 degrees, granules begin to absorb the liquid and swell -at 80 degrees, particles will have absorbed 5x max vol of water until burst
2 of 15
What happens when particles burst?
They release starch and mixture becomes thick, it is complete when liquid reaches 100 degrees
3 of 15
Functions of sugar
Preserves food, caramelisation, and stabilizes
4 of 15
How does sugar preserve food?
Creates unsuitable conditions for micro organisms
5 of 15
What is caramelisation?
Sugar turns golden brown when heated
6 of 15
Example of protein
Eggs
7 of 15
What is protein?
Small units of amino acids that are linked together in a chain
8 of 15
Functions of protein
Coagulation and Aeration
9 of 15
What is coagulation?
When eggs are heated they change colour and become firm-set
10 of 15
How does protein aerate?
Eggs trap air when beaten
11 of 15
Function of fat?
Shortening
12 of 15
First step of shortening.
Fat coats flour particles and this prevents the absorption of water, giving waterproof coating
13 of 15
Second step of shortening.
Prevents gluten from developing which can give elastic mixture
14 of 15
Third step of shortening.
Gluten is formed when protein in the flour mixed with water
15 of 15

Other cards in this set

Card 2

Front

Gelatinisation

Back

-starch particles do not dissolve in liquid (suspension) -if not stilled, granules sink to form lumps -heated at 60 degrees, granules begin to absorb the liquid and swell -at 80 degrees, particles will have absorbed 5x max vol of water until burst

Card 3

Front

What happens when particles burst?

Back

Preview of the front of card 3

Card 4

Front

Functions of sugar

Back

Preview of the front of card 4

Card 5

Front

How does sugar preserve food?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Design & Technology: Food Technology resources:

See all Design & Technology: Food Technology resources »See all Functional properties resources »