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Worksheets

Food Reactions

Total questions: 14

Worksheet time: 7mins

Name
Class
Date
1.

What is the process where starch granules absorb water and swell upon heating?

a)

Caramelisation

b)

Dextrinisation

c)

Gelatinisation

d)

Maillard Browning

2.

Which reaction results in toasty and nutty flavors by breaking down long-chain starch molecules?

a)

Denaturation

b)

Caramelisation

c)

Dextrinisation

d)

Foaming

3.

At what temperature does sugar undergo caramelisation?

a)

Above 140 °C

b)

Above 160 °C

c)

Below 100 °C

d)

Between 120-140 °C

4.

What causes the desirable brown color and roasted flavor in meat during Maillard browning?

a)

Denaturation of proteins

b)

Absorption of water by starch granules

c)

Reactions between sugars and proteins

d)

Formation of foam by protein denaturation

5.

What happens to proteins during denaturation?

a)

They solidify

b)

They form a network

c)

They uncoil and lose their original structure

d)

They absorb water

6.

What is formed when egg white is beaten and protein strands denature to wrap around air bubbles?

a)

Foam

b)

Caramel

c)

Gluten

d)

Dextrin

7.

What is the result of coagulation in protein-rich foods?

a)

Browning

b)

Solidifying or curdling

c)

Absorption of water

d)

Formation of foam

8.

What is the purpose of shortening in baked products like scones?

a)

To form a protein network

b)

To reduce gluten networks

c)

To stabilize egg white foam

d)

To increase gluten strands

9.

What is needed to stabilize emulsions like mayonnaise and cream?

a)

Fats

b)

Emulsifiers

c)

Proteins

d)

Water

10.

What is the temperature at which a fat turns from a solid to a liquid state?

a)

Boiling point

b)

Smoke point

c)

Melting point

d)

Freezing point

11.

Identify the two ingredients used in the following Tart Shell recipe that contributed to Maillard Browning.

Tart Shell

70g cold butter

20g egg

35g icing sugar

100g plain flour

a)

Cold butter and egg

b)

Egg and icing sugar

c)

Plain flour and icing sugar

d)

Plain flour and cold butter

12.

Which of the following browning reactions is an undesirable reaction in apples?

a)

Caramelisation

b)

Dextrinisation

c)

Enzymatic browning

d)

Maillard browning

13.

Which of the following cooking process shows the occurrence of 'gelatinisation'?

a)

Boiling rice

b)

Frying onion rings

c)

Roasting chicken

d)

Toasting bread

14.

Enzymatic browning is a reaction observed on the surface of certain fruit and vegetables when they are cut or bruised.

Identify the measures that can be taken to reduce enzymatic browning.

1 Immerse cut fruit pieces in lemon juice to reduce its pH.

2 Spray baking soda solution onto cut fruit pieces to prevent oxidation.

3 Coat cut fruit with baking powder solution to reduce enzyme activity.

4 Keep cut fruit in the chiller in cling wrap to reduce contact with oxygen.

5 Cut fruit and vegetables just before use or consumption.

a)

1, 2 and 3

b)

1, 4 and 5

c)

2, 3 and 4

d)

2, 3 and 5