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1

The diagram shows a typical plant cell after being placed in a concentrated salt solution for ten minutes. Which numbered structures are partially permeable?

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

1. Cells  →  1.1. Cell structure and function

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2

The small intestine of a person contains a low concentration of glucose produced from the digestion of starch. Glucose is taken up by the cells of the villi. How does the glucose move?

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

8. Human nutrition  →  8.3. Absorption and assimilation

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

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3

In an experiment to investigate the effects of heat on germinating barley grains, three petri dishes were set up as shown...

4. Biological molecules  →  4.1. Biological molecules

5. Enzymes  →  5.2. Effects of temperature and pH

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4

Enzyme action can be explained by the lock and key hypothesis. Where is the active site and which acts as the lock or key?

5. Enzymes  →  5.1. Enzyme action

5. Enzymes  →  5.2. Effects of temperature and pH

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5

Where and how does carbon dioxide enter a 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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6

Four tubes, A, B, C and D are left in sunlight for one hour. The bicarbonate indicator solution in each tube is red at the start of the experiment. Bicarbonate indicator solution stays red if there is no change in carbon dioxide concentration. The indicator goes yellow if carbon dioxide concentration increases and purple if the carbon dioxide concentration decreases. In which tube does the colour change to purple?

6. Plant nutrition  →  6.1. Photosynthesis

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7

The graph shows the amount of oxygen produced by a green plant during a 24-hour period. Which letter represents midnight?

6. Plant nutrition  →  6.1. Photosynthesis

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8

What is produced as a result of digestion by a protease?

8. Human nutrition  →  8.2. Human digestive system

13. Excretion  →  13.1. Excretion

13. Excretion  →  13.2. Urinary system

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9

For which food test must the sample be dissolved in ethanol?

4. Biological molecules  →  4.1. Biological molecules

18. Biotechnology and genetic modification  →  18.1. Biotechnology

8. Human nutrition  →  8.2. Human digestive system

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10

An experiment was set up to investigate the effect of an enzyme on coagulated egg albumen. The results, after three hours, are shown...

5. Enzymes  →  5.2. Effects of temperature and pH

13. Excretion  →  13.2. Urinary system

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11

When a complete ring of bark is removed from the trunk of a tree, it will eventually die because this action cuts off the supply of A mineral salts to the leaves. B nutrients to the roots. C oxygen to the roots. D water to the leaves.

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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12

The diagram shows a transverse section from the middle of a root of a dicotyledonous plant. In which tissue are sugars and amino acids transported?

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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13

The diagram represents part of the human circulatory system. Where is the blood pressure highest?

11. Transport in humans  →  11.2. Heart

11. Transport in humans  →  11.1. Circulatory system

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14

The graph shows pressure changes in the left ventricle and the left atrium in one cycle of contraction of the heart. During which period of time is the ventricle contracting?

11. Transport in humans  →  11.2. Heart

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15

In the human body, blood circulating from the gut to the heart passes through the A aorta. B kidneys. C liver. D lungs.

11. Transport in humans  →  11.3. Blood vessels

11. Transport in humans  →  11.2. Heart

8. Human nutrition  →  8.3. Absorption and assimilation

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16

An experiment is set up as shown...

6. Plant nutrition  →  6.1. Photosynthesis

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

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17

The composition of inhaled air and exhaled air is different. Which analysis is correct?

9. Human gas exchange  →  9.1. Human gas exchange

13. Excretion  →  13.1. Excretion

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18

Which does not produce carbon dioxide?

13. Excretion  →  13.1. Excretion

9. Human gas exchange  →  9.1. Human gas exchange

11. Transport in humans  →  11.4. Blood

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19

The diagram shows the main muscles and bones of the arm. Which lines correctly identify the biceps muscle, the humerus and a hinge joint?

11. Transport in humans  →  11.2. Heart

9. Human gas exchange  →  9.1. Human gas exchange

11. Transport in humans  →  11.3. Blood vessels

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20

The diagram represents a kidney dialysis machine. blood to patient blood from patient Y X Z fresh dialysis fluid used dialysis fluid What are the parts labelled X, Y and Z?

13. Excretion  →  13.2. Urinary system

11. Transport in humans  →  11.4. Blood

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21

When a person is cold, nerve impulses from the hypothalamus cause the skin to reduce the rate of heat loss. What is the effect of these nerve impulses on the hair erector muscles and on the arterioles near the skin surface?

14. Coordination and control  →  14.5. Temperature control

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22

Adrenaline is secreted quickly when a person is frightened. How does this affect the heart beat and the liver?

14. Coordination and control  →  14.3. Mammalian hormones

14. Coordination and control  →  14.6. Blood glucose control

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23

Which part of the nervous system is the centre for processes such as thought, memory and judgement?

14. Coordination and control  →  14.1. Mammalian nervous system

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24

The graph shows changes in a person’s blood glucose concentration over four hours. blood glucose time / hours X Y What might cause the changes at X and Y?

14. Coordination and control  →  14.6. Blood glucose control

14. Coordination and control  →  14.3. Mammalian hormones

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25

The table shows the death rates from lung cancer amongst smokers and non-smokers. average number of cigarettes smoked per day deaths from lung cancer per year per 100 000 people 1-14 15-25 26 or more What can be concluded from the data?

12. Disease and immunity  →  12.1. Disease

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26

What is the role of the bacteria used in cheese and yoghurt production?

18. Biotechnology and genetic modification  →  18.1. Biotechnology

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27

The diagram shows a fermenter used for the production of antibiotics. water in water out W X Y Z motor stirring paddles pH and temperature sensors What happens at W, X, Y and Z?

18. Biotechnology and genetic modification  →  18.1. Biotechnology

12. Disease and immunity  →  12.2. Antibiotics

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28

A decrease in the numbers of producers in a food chain will cause A the consumers to increase in numbers. B more animals to migrate into the area. C the total productivity to increase. D the total biomass to decrease.

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

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

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29

The diagram shows a food web from an ecosystem. badgers squirrels insects sagebrush prickly pear pronghorn deer lizards coyotes If the population of insects decreases, which other population will decrease the most?

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

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

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30

The diagram shows part of the carbon cycle. carbon dioxide in atmosphere carbon compounds in plants carbon compounds in animals carbon compounds in decomposers Which numbered arrows represent respiration?

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

6. Plant nutrition  →  6.1. Photosynthesis

13. Excretion  →  13.1. Excretion

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31

Which term describes the role of the mosquito in the transmission of malaria?

12. Disease and immunity  →  12.1. Disease

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32

Cutting down large areas of tropical forest can lead to a reduction in rainfall. What is the reason for the reduction in rainfall?

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

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

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

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33

New plants may be grown from groups of cells that are taken from other plants. The diagram shows part of plant X. From which structure will cell samples grow into new plants that are genetically identical to plant X?

1. Cells  →  1.1. Cell structure and function

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

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34

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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35

The diagram shows the female reproductive system. In which parts are the eggs and the zygote formed?

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

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36

The diagram shows the male reproductive and urinary systems. Which structure produces the fluid part of semen?

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

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37

What causes sickle cell anaemia?

17. Inheritance  →  17.3. Inheritance

8. Human nutrition  →  8.1. Diet

12. Disease and immunity  →  12.3. Immunity

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38

The diagram shows the inheritance of coat colour in mice. Which mouse is heterozygous for coat colour?

17. Inheritance  →  17.3. Inheritance

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39

Two fruit flies with normal wings were mated with each other. For every three offspring with normal wings, there is one with short wings. What are the genotypes of the parents?

17. Inheritance  →  17.3. Inheritance

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40

What is a result of natural selection?

17. Inheritance  →  17.4. Selection

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