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1

What are characteristics of bacteria?

1. Cells  →  1.1. Cell structure and function

18. Biotechnology and genetic modification  →  18.1. Biotechnology

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2

Some students were provided with some specimens of arthropods. They counted the number of legs on each arthropod. Their results are shown...

19. Relationships of organisms with one another and with the environment  →  19.3. Ecosystems and biodiversity

2. Classification  →  2.2. Features of organisms

19. Relationships of organisms with one another and with the environment  →  19.5. Conservation

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3

The diagram shows two plant cells, X and Y. Cell X has a higher water potential than Y. X Y In which direction and by which process will water move between these two cells?

3. Movement into and out of cells  →  3.1. Diffusion and osmosis

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4

Which row identifies how ions and molecules move by active transport?

3. Movement into and out of cells  →  3.2. Active transport

3. Movement into and out of cells  →  3.1. Diffusion and osmosis

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5

A student carried out two tests on a liquid. When Benedict’s solution was added to half of the liquid and heated, it turned red. When biuret reagent was added to the rest of the liquid, it turned mauve . Which conclusion is correct?

4. Biological molecules  →  4.1. Biological molecules

5. Enzymes  →  5.2. Effects of temperature and pH

3. Movement into and out of cells  →  3.1. Diffusion and osmosis

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6

Enzymes are involved in many reactions in living cells. Which statement describes the action of enzymes?

5. Enzymes  →  5.1. Enzyme action

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7

The diagram shows the movement of substances involved in photosynthesis in a leaf. Which row shows the correct labels for the diagram?

6. Plant nutrition  →  6.1. Photosynthesis

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8

The diagram shows a plant cell. P Compared with the rest of the cell, which row describes the concentrations of oxygen and magnesium inside structure P during the daytime?

1. Cells  →  1.1. Cell structure and function

6. Plant nutrition  →  6.2. Leaf structure

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9

The diagram shows a root hair cell. How does the shape of the cell help the plant?

7. Transport in flowering plants  →  7.1. Uptake and transport of water and ions

3. Movement into and out of cells  →  3.2. Active transport

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10

A student used the apparatus shown...

7. Transport in flowering plants  →  7.2. Transpiration and translocation

7. Transport in flowering plants  →  7.1. Uptake and transport of water and ions

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11

A deficiency disease in children causes soft and deformed bones. What is the name and cause of this deficiency disease?

8. Human nutrition  →  8.1. Diet

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12

The diagram shows the human digestive system. Where do egestion and ingestion occur?

8. Human nutrition  →  8.2. Human digestive system

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13

Which graph best represents the effect of pH on the action of gastric protease?

5. Enzymes  →  5.2. Effects of temperature and pH

8. Human nutrition  →  8.2. Human digestive system

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14

The graph shows the changes in lung volume during breathing when a person was at rest and then when they began to exercise. lung volume / dm3 time / s at rest exercise From resting to exercise, the volume of air breathed in at each breath increased from x dm3 to y dm3. Looking at the graph, which numbers correctly complete the gaps in the sentence?

9. Human gas exchange  →  9.1. Human gas exchange

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15

What are the products of anaerobic respiration in muscle?

10. Respiration  →  10.3. Anaerobic respiration

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16

Which label shows where lactic acid is broken down?

10. Respiration  →  10.3. Anaerobic respiration

8. Human nutrition  →  8.2. Human digestive system

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17

Two people carried out a short period of exercise on a treadmill. Each of the two people ran on the treadmill for the same amount of time and at the same speed. The graph shows the pulse rates of these two people before, during and after the period of exercise. pulse rate / beats per minute time / minutes period of exercise person X person Y Which interpretation of the graph is correct?

11. Transport in humans  →  11.2. Heart

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18

Which blood vessels carry deoxygenated blood?

11. Transport in humans  →  11.3. Blood vessels

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19

What describes the microorganism that causes cholera and its method of transmission?

12. Disease and immunity  →  12.1. Disease

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20

The chart gives information about a car being driven at 110 km / h by someone who has not consumed alcohol. It shows how far the car travels from the time the driver sees a hazard and reacts by using the brakes and how far the car will then travel before finally stopping. distance travelled / m hazard seen brakes used car stops If the same driver consumes alcohol before driving, the distance travelled before reacting to the hazard increases by 20%. What would then be the total distance travelled by the car before stopping?

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21

Drugs can be used to treat infections in the body. What are antibiotics used for?

12. Disease and immunity  →  12.2. Antibiotics

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22

Human immunodeficiency virus (Haffects the immune system resulting in decreased lymphocyte numbers. The diagnosis of AIDS can be made when lymphocyte numbers decrease below 200 cells / mm3 of blood. The graph shows the lymphocyte numbers after HIV infection in a patient. years after infection lymphocyte count / cells per mm3 of blood How many years after infection would this patient be diagnosed with AIDS?

12. Disease and immunity  →  12.3. Immunity

12. Disease and immunity  →  12.1. Disease

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23

Some people require a treatment called dialysis to remove waste products and excess salts from their blood. For these individuals, which part of the body is not functioning correctly?

13. Excretion  →  13.2. Urinary system

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24

Which change occurs in the eye as a person focuses on a vehicle approaching from a long distance?

14. Coordination and control  →  14.2. Mammalian sense organs

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25

A light was shone into a person’s eye for 50 seconds. During this time, the intensity of the light was varied. The graph shows changes in the person’s pupil size. time / seconds diameter of pupil / mm Which statement explains the change in pupil size?

14. Coordination and control  →  14.2. Mammalian sense organs

6. Plant nutrition  →  6.1. Photosynthesis

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26

The graph shows the blood sugar level for a person over eight hours. They did not exercise during this time. 06:00 08:00 10:00 time of day 12:00 14:00 normal breakfast eaten X Y blood sugar level Which statement explains the shape of the graph between X and Y?

14. Coordination and control  →  14.6. Blood glucose control

14. Coordination and control  →  14.3. Mammalian hormones

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27

Which actions may lead to the contraction of hair erector muscles in the skin?

14. Coordination and control  →  14.5. Temperature control

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28

An experiment on the growth of a young plant shoot was set up, as shown...

15. Coordination and response in plants  →  15.1. Coordination and response in plants

6. Plant nutrition  →  6.1. Photosynthesis

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29

A scientist takes four pairs of samples from a wild cherry tree. In which pair of samples could there be cells with different genotypes?

16. Development of organisms and continuity of life  →  16.1. Nuclear division

17. Inheritance  →  17.3. Inheritance

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30

The diagram shows how a large number of carrot plants can be produced from small pieces of carrot root. root of carrot plant each small plant grows into a new carrot plant pieces of carrot root are removed pieces of carrot root are grown into small plants Which row is correct for this method of plant production?

16. Development of organisms and continuity of life  →  16.3. Sexual reproduction in plants

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31

In plant reproduction, the following processes occur. fertilisation growth of a pollen tube pollination seed germination In which order do these processes take place?

16. Development of organisms and continuity of life  →  16.3. Sexual reproduction in plants

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32

Which hormone causes the release of an egg cell from the ovary?

16. Development of organisms and continuity of life  →  16.4. Sexual reproduction in humans

14. Coordination and control  →  14.3. Mammalian hormones

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33

The diagram shows a baby about to be born. Which labelled structures are the cervix and uterus?

16. Development of organisms and continuity of life  →  16.4. Sexual reproduction in humans

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34

In a DNA molecule, bonds between pairs of bases hold the strands together. Which pairs of bases are found in DNA?

17. Inheritance  →  17.2. DNA

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35

The inheritance of the ABO blood groups in humans is controlled by three alleles (IA, IB and IO), only two of which can be present in one individual. What are the possible blood groups of children born to a homozygous group A woman and a heterozygous group B man?

17. Inheritance  →  17.3. Inheritance

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36

The antibiotic penicillin is produced by a fungus called Penicillium. The graph shows the changes in the masses of Penicillium fungus, penicillin and sugar in a fermenter during the production of a batch of antibiotic. mass in fermenter time in fermenter X Y Z What is represented by each curve on the graph?

12. Disease and immunity  →  12.2. Antibiotics

18. Biotechnology and genetic modification  →  18.1. Biotechnology

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37

The diagram shows a food chain. mahogany tree  caterpillar  songbird  hawk Which organisms are present in the largest numbers in this food chain?

19. Relationships of organisms with one another and with the environment  →  19.1. Energy flow

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38

Some bacteria and fungi are decomposers. What is produced when decomposers break down plant and animal protein?

19. Relationships of organisms with one another and with the environment  →  19.2. Nutrient cycles

6. Plant nutrition  →  6.3. Mineral nutrition

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39

What is the definition of a community?

19. Relationships of organisms with one another and with the environment  →  19.3. Ecosystems and biodiversity

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40

The list shows some changes that may occur in a lake that is polluted with nitrogen-containing fertiliser. Concentration of oxygen decreases. Decomposers feed on plants. Green microorganisms grow and cover the surface. Plants die. In which order do these changes occur?

19. Relationships of organisms with one another and with the environment  →  19.4. Effects of humans on ecosystems

6. Plant nutrition  →  6.1. Photosynthesis

19. Relationships of organisms with one another and with the environment  →  19.2. Nutrient cycles

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