Biology Autumn 2022/23

Question 1

1 List the 7 parts of a balanced diet.

Answer 1

carbohydrate, protein, fat (lipid), vitamins, minerals, fibre, water

Question 2

2 What is meant by a balanced diet?

Answer 2

Having the correct amount of each nutrient to enable healthy growth and activity.

Question 3

3 What do we use to test for starch?

Answer 3

Iodine

Question 4

4 What is the sign that starch is present?

Answer 4

Colour change orange- black

Question 5

5 What do we use to test for protein?

Answer 5

Biuret solution

Question 6

6 What is the sign that protein is present?

Answer 6

Blue - purple

Question 7

7 What does the stomach contain and why?

Answer 7

The stomach contains acid (HCl) which destroys harmful bacteria and makes the pH right for digestion of protein.

Question 8

8 What happens in the small intestine?

Answer 8

In the small intestine small food particles are transferred from the digestive system into the blood.

Question 9

9 What is an enzyme?

Answer 9

An enzyme is biological catalyst.

Question 10

10 What do enzymes do?

Answer 10

A catalyst is something which speeds up chemical reactions, so an enzyme is something which speeds up chemical reactions in living things.

Question 11

11 What is glucose used for?

Answer 11

Respiration- energy

Question 12

12 What are pathogens?

Answer 12

Disease causing micro-organisms

Question 13

13 Name three types of pathogen.

Answer 13

Bacteria, viruses and fungi

Question 14

14 Define a non-communicable disease.

Answer 14

A non-communicable disease is one that is not caused by a pathogen and cannot be spread.

Question 15

15 What happens in the respiratory system of a person suffering from asthma?

Answer 15

If you have asthma your bronchioles can become inflamed, swollen and constricted (narrowed), and excess mucus is produced.

Question 16

16 List 3 lifestyle factors that can be bad for health.

Answer 16

smoking, drinking alcohol, having an unbalanced diet

Question 17

17 Classify the following drugs as stimulants or depressants: alcohol, caffeine, heroine, cannabis, cocaine, MDMA.

Answer 17

Stimulants: caffeine, cocaine, MDMA. Depressants: heroine, cannabis, alcohol

Question 18

18 Define obesity.

Answer 18

Obesity is being very overweight.

Question 19

19 Describe what happens when the energy you take in as food and drink is more than the energy you use.

Answer 19

If your energy intake is more than your energy use then you will gain weight.

Question 20

20 What is malnutrition?

Answer 20

Malnutrition is not having enough, or having too much, of one or more of nutrients.