Biology

1. Poor food hygiene when preparing a meal can cause food poisoning.

Which of the following is an example of poor food hygiene?

A. cleaning food preparation surfaces

B. handwashing before and after food preparation

C. storing food in a refrigerator

D. storing food in an unsealed container

2. The picture shows a microscope.

Which of the following can only be observed using a microscope?

A. bacteria

B. insects

C. mammals

D. reptiles
3. The diagram shows the effect of exercise on the pulse rate of a student.

The student starts exercising at position X and stops exercising at position Y.

(a) State the length of time the student was exercising.

.............................................................. minutes

(b) State the name of the organ that causes the pulse.

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(c) The blood and lungs are parts of the body involved during exercise.

Draw one straight line from each of these parts to its function during exercise.

Body part Function

4. When a person breathes, their lungs inflate and deflate.

What is the reason why lungs inflate?

A. to decrease the amount of blood in the lungs

B. to decrease the amount of oxygen in the lungs

C. to increase the amount of blood in the lungs

D. to increase the amount of oxygen in the lungs

5. A boy is walking to school. As he is late he starts running.

What happens to his heart beat and breathing rate?

Tick one

A. his heart beats faster and his breathing gets slower

B. his heart beats slower and his breathing gets faster

C. his heart beats faster and his breathing gets faster

D. his heart beats slower and his breathing gets slower

6. Which row of the table shows three types of micro-organism?

Tick one

A. ants bacteria viruses

B. bread viruses yeast

C. viruses yeast bacteria

D. yeast soil bacteria

7. Micro-organisms can be helpful or harmful.
Which row of the table correctly shows a helpful and a harmful use of
micro-organisms?

helpful harmful Tick one

A making bread and cheese making compost

B making food go mouldy making bread and cheese

C causing disease making food go mouldy

D making compost causing disease

8. (a) The table contains some statements about the human circulatory system.

For each statement tick (√) the correct column to show if the statement is true or
false.

True False

the heart pumps blood around the body

the blood picks up oxygen in the lungs

the nose is part of the circulatory system

ventilation of the lungs is called respiration

 (b) Here are two statements about blood.

Complete each statement by underlining the correct word in the box.

• Blood travels to the lungs which are found in the .........................

head thorax throat

• Blood travels to all parts of the body through blood

pipes tubes vessels

(c) The blood carries water and oxygen around the body.

Name one other thing that the blood carries around the body.

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9. A scientist investigates the pulse rate of several different animals.
She takes the pulse rates of ten of each type of animal.

(a) Why did the scientist take the pulse rate of ten of each type of animal?
...........................................................................................................................................................................................................................................................................................................................

...........................................................................................................................................................................................................................................................................................................................

(b) These are her results for the ten horses.

42 36 45 98 39 49 46 47 41 51

She thinks one of the results is wrong.

Circle the result that is wrong.

(c) The table shows the average pulse rate of five different animals.

animal average pulse rate in beats per minute

rabbit 205

cat 150

human 60

horse 44

elephant 30

Use the table to complete the bar graph to show the average pulse rate of
these animals.
You should also add labels to the axes.
(d) Predict what the pulse rate of a mouse might be.

................................................................................................................................................................
10. The picture shows a horse and rider.

Why are both the horse and the rider classified as vertebrates?

A. they both have backbones

B. they both have four limbs

C. they both have hearts

D. they both reproduce

11. Which of these describes respiration?

A. breathing out used air from the lungs

B. breathing oxygen from the air into the lungs

C. pumping blood containing oxygen around the body

D. the use of oxygen by the organs of the body

12. Some microorganisms on food can cause food poisoning.

Give two ways of reducing the risk of food poisoning from microorganisms.

1. ...........................................................................................................................................................

................................................................................................................................................................

2. ...........................................................................................................................................................

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13. The photograph shows a racing cyclist crouching low over the handlebars..

Here are five statements about a cyclist’s pulse rate when riding in a race.

Tick (√) the one statement that is correct.

their pulse rate will decrease because they are crouching

their pulse rate will decrease because they are breathing quickly

their pulse rate will increase because their muscles need more oxygen

their pulse rate will increase because they are very fit

their pulse rate will stay the same because they are crouching
14. The diagram shows some of the organs, labelled A, B, C and D, in the human
body.

Which organ is the lung?

organ A organ B organ C organ D

15. Which row of the table shows three microorganisms?

Tick one

A ant bacteria yeast

B yeast bacteria virus

C bacteria moss virus

D moss yeast ant

16. The picture shows the human body.

A. forehead

B. kneecap

C. nose

D. wrist

17. A student investigates the effect of eating an apple on their pulse rate.

The table shows the student’s results.

Pulse rate in beats per minutes

(bpm)
Pulse per before eating an apple 80
Pulse per after eating an apple 100

Which statement about the results is true?

A. the pulse rate decreases by 20 bpm

B. the pulse rate increases by 20 bpm

C. the pulse rate stays at 80 bpm

D. the pulse rate stays at 100 bpm

18. Micro-organisms can be useful or they can be harmful.

Which of the following is an example of micro–organisms being useful?

A. causing disease

B. causing food poisoning

C. making food mouldy

D. making yoghurt

19. Air is a mixture of gases including nitrogen, oxygen and carbon dioxide.

The table shows the percentage of these gases in the air when breathed into the
lungs and the percentage of these gases in the air when breathed out of the
lungs.

percentage of
nitrogen oxygen carbon dioxide
air breathed into the lungs 78 20 less than 1
air breathed out of the lungs 78 16 4

Explain what happens to the percentage of oxygen in the lungs during

breathing.

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20. State the function of the heart in the human circulatory system.

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21. Water fleas are small microscopic animals.

The diagram shows a water flea and the position of its heart.

A student investigates the effect of different types of water on the number of

heart beats per minute of the water flea.

The student uses river water, lake water, rainwater and stream water.

The temperature of each type of water is kept the same.

The student measures the heart rate of the water flea by counting the number
of heart beats per minute.

The student’s investigation involves the following four steps.

They are not in the correct order.

Step A: place the water flea in the same volume of each type of water being
tested
Step B: measure the number of heart beats of the water flea per minute in each
type of water
Step C: measure the number of heart beats per minute of the water flea in its
normal environment
Step D: return the water flea to its normal environment

(a) Write the letters A, B and C in the boxes to show the correct order of the
steps in the investigation. Step D has already been done for you.

(b) Give a reason why the same temperature is used for each type of water.

................................................................................................................................................................

(c) The table shows the results the student obtains.

Number of heart beats of the water flea per minute

Test 1 Test 2
Normal environment 115 115
River water 137 138
Lake water 147 145
Rainwater 124 125
Stream water 131 129

Explain why the student obtains two sets of results.

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22. Which of these are all micro-organisms?

A. bacteria, birds, plants

B. animals, bacteria, viruses

C. invertebrates, viruses, yeast

D. bacteria, yeast, viruses

23. Which method keeps food fresh for the longest time?

A. keeping it in a dark cupboard

B. keeping it in a refrigerator

C. leaving it on the windowsill

D. leaving it in fresh air

24. (a) Draw circles around the three parts of the human body that are part of
the circulatory system.

arm blood brain heart

kidneys lungs thorax blood vessels

(b) Explain why pulse rate increases during exercise.

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 Answers

1. D

2. A

2.

4. D

5. C

6. C

7. D

8. (a) true true false false (in this order from top to bottom)

(b) thorax

Vessels
 (c) nutrients

ACCEPT vitamins, minerals, carbon dioxide, hormones

IGNORE blood/blood cells/water/oxygen

9. (a) (because) one might not be correct / improve reliability

ALLOW to find the average ALLOW to see the variation in pulse rate

REJECT to make it a fair test REJECT to increase accuracy of results

(b) 98

(c) each animal labelled on x-axis

y-axis labelled (average) pulse rate

(d) stated value above 205 up to a maximum 1500

10. Tick all three A, C & D

11. Tick D

12. any of the following

wash hands (with soap/detergent to remove microorganisms/bacteria)

clean/disinfect work surfaces (to remove micro-organisms/bacteria)

keep food in fridge (to prevent micro-organisms/bacteria reproducing)

Accept any other appropriate response

13. their pulse rate will increase because their muscles need more oxygen √

14. organ B
15. tick B

16. D wrist

17. B

18. D

19. (oxygen) has decreased (by 4%)

(Oxygen) is used in respiration

Accept: passes / dissolves into the blood and is carried round the body.

Accept: used for energy release

20. Pumps blood (around the body

21. (a) C A B

(b) the temperature of the water is a control variable

Allow to make it a fair test

Accept the type of water is the variable being tested

(c) The test/investigation is repeated

to improve the reliability (of the investigation results).

Do not accept accuracy

22. D

23. B

24. (a) blood , heart and blood vessels

 (b) because heart rate increases as muscles need more (blood carrying)
oxygen / nutrients

Accept heart beats or pumps faster or harder OR heart pumps more blood