Unit 1 - Food and Energy

Question 1

Name 3 important functions of food in the body.

Answer 1

1) energy needed for movement and developmen
2) growth and repair
3) components reqiured to prevent the body from illness and keep it healthy

Question 2

List the 7 dietary components

Answer 2

carbohydrates, protein, fats, vitamins, minerals, fats, water and fibre

Question 3

Carbohydrates, fats and proteins all contain 3 elements. List them.

Answer 3

Carbon, hydrogen and oxygen

Question 4

Which additional element does protein contain?

Answer 4

Hydrogen

Question 5

What is meant by having a balanced diet?

Answer 5

Eating all nutrients in the correct proportions

Question 6

Carbohydrates contain which simple sugars?

Answer 6

Sucrose, glucose and lactose

Question 7

Carbohydrates contain which complex sugars?

Answer 7

Cellulose, glycogen and starch

Question 8

List 5 starchy foods.

Answer 8

Bread, pasta, rice, potatoes, cereals

Question 9

List 4 sugary foods.

Answer 9

Fizzy drinks, sweets, chocolate, fruit

Question 10

What do carbohydrates provide us with?

Answer 10

Energy

Question 11

Is sugar a slow or fast acting energy source?

Answer 11

Fast acting

Question 12

Is starch a fast or slow energy release energy source?

Answer 12

Slow release

Question 13

How do we store carbohydrate in our bodies?

Answer 13

As glycogen

Question 14

What is glycogen broken down into when sugar reseves are low in the body?

Answer 14

Glucose

Question 15

What role does cellulose in plant cells have in our body?

Answer 15

This is fibre which adds bulk to our diet, helping the muscles of the intestine push food along.

Question 16

What solution is used to test for starch?

Answer 16

Iodine

Question 17

What is the colour change of iodine when starch is present?

Answer 17

Yellow-brown to blue-black

Question 18

What reagent is used to detect sugar?

Answer 18

Benedicts solution

Question 19

What change occurs with benedicts solution when sugar is present?

Answer 19

Blue to brick-red precipitate

Question 20

What main structures of the body does protein form?

Answer 20

Skin and muscles

Question 21

What is protein required for?

Answer 21

Growth and repair of tissues

Question 22

What are the special protein molecules which control chemical reactions?

Answer 22

Enzymes

Question 23

When reserves of carbohydrates and fat are low, what is protein used for?

Answer 23

Energy

Question 24

What are the smaller molecules that protein is made up?

Answer 24

Amino acid

Question 25

How many amino acids are there?

Answer 25

20

Question 26

Which foods are proteins plentiful in?

Answer 26

Meat, fish, eggs

Question 27

What is the test for protein?

Answer 27

Biuret solution