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1

Some structures found in cells are listed. cell wall cell membrane chloroplast cytoplasm nucleus Which structures are found in both animal cells and plant cells?

1. Cells  →  1.1. Cell structure and function

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2

Which processes can only occur through a membrane?

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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3

Identical pieces of potato are placed in sucrose solutions of different concentrations. After three hours, the mass of each potato piece is measured. Which graph shows the results of this experiment?

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

6. Plant nutrition  →  6.1. Photosynthesis

4. Biological molecules  →  4.1. Biological molecules

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4

Starch is digested to maltose by the enzyme amylase. According to the ‘lock and key’ hypothesis, which is the ‘key’ and which is the ‘lock’?

5. Enzymes  →  5.1. Enzyme action

8. Human nutrition  →  8.2. Human digestive system

4. Biological molecules  →  4.1. Biological molecules

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5

If a condition is a limiting factor for photosynthesis, what does this mean?

6. Plant nutrition  →  6.1. Photosynthesis

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6

The diagram shows cells in a section through a leaf of a green plant. (No cell contents are shown...

1. Cells  →  1.1. Cell structure and function

6. Plant nutrition  →  6.2. Leaf structure

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7

Two aquarium tanks are set up as shown...

6. Plant nutrition  →  6.1. Photosynthesis

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

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8

Which process is stimulated by adrenaline in the cells of the liver?

14. Coordination and control  →  14.3. Mammalian hormones

13. Excretion  →  13.2. Urinary system

13. Excretion  →  13.1. Excretion

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9

Which fact about proteins makes them essential components of the human diet?

8. Human nutrition  →  8.2. Human digestive system

8. Human nutrition  →  8.1. Diet

6. Plant nutrition  →  6.3. Mineral nutrition

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10

Transpiration increases when conditions become A less humid and less windy. B less humid and more windy. C more humid and less windy. D more humid and more windy.

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

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11

The diagram shows a section through a green leaf. The arrows represent the movement of A carbon dioxide during respiration. B oxygen during photosynthesis. C sugars during translocation. D water during transpiration.

6. Plant nutrition  →  6.1. Photosynthesis

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

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12

The diagram shows the direction of blood flow in the human body. capillaries in the lungs right side of the heart capillaries in the organs of the body left side of the heart Which numbered stages have blood containing the most oxygen?

11. Transport in humans  →  11.3. Blood vessels

9. Human gas exchange  →  9.1. Human gas exchange

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13

The graph shows pressure changes in the left atrium and in the left ventricle during one heartbeat. 0.8 pressure / kPa time / s X atrium ventricle What is the state of the valves in the heart at time X?

11. Transport in humans  →  11.2. Heart

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14

What is a difference between plasma and tissue fluid?

11. Transport in humans  →  11.4. Blood

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15

What are the products of aerobic respiration in yeast?

10. Respiration  →  10.3. Anaerobic respiration

10. Respiration  →  10.1. Respiration

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16

The diagram represents the human respiratory system. X Y Z Which structures contain muscles that contract when breathing in?

9. Human gas exchange  →  9.1. Human gas exchange

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17

Which substance builds up in a muscle as a result of anaerobic respiration?

10. Respiration  →  10.3. Anaerobic respiration

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18

The diagram shows apparatus used to investigate breathing. M tube X tube Y orange hydrogencarbonate indicator solution At the start, both tubes contain orange hydrogencarbonate indicator solution. The solution is orange when atmospheric air passes through it. The solution changes to red when air with less carbon dioxide passes through it. The solution changes to yellow when air with more carbon dioxide passes through it. Which changes occur to the hydrogencarbonate indicator solution in tubes X and Y when a person breathes in and out through the tube M?

9. Human gas exchange  →  9.1. Human gas exchange

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19

The diagram shows a pair of chromosomes from the same cell. P What do the lines labelled P point to?

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

17. Inheritance  →  17.2. DNA

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20

Which substances can be removed from the blood by kidney machines?

13. Excretion  →  13.2. Urinary system

11. Transport in humans  →  11.4. Blood

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21

The diagram shows skin temperature of a human when exposed to warm air and then exposed to cold air. human in warm air human in cold air key skin temperature above 26 °C 26 °C or below What causes the observed change in skin temperature on exposure to cold air?

14. Coordination and control  →  14.5. Temperature control

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22

A child is frightened by a loud noise and shouts for help. In which order are the different types of neurone involved in this response?

14. Coordination and control  →  14.1. Mammalian nervous system

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23

Which of these is a sign of diabetes mellitus?

14. Coordination and control  →  14.6. Blood glucose control

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24

How many planes of movement are possible at the elbow and shoulder?

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25

Which listed substances are all broken down by the liver?

13. Excretion  →  13.2. Urinary system

13. Excretion  →  13.1. Excretion

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26

An ocean is polluted by an oil spill. Which is least likely to speed up the rate of decomposition of oil by microorganisms?

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  →  19.2. Nutrient cycles

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

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27

The diagram shows a cell. cytoplasm cell wall strand of DNA 1 µm To which group of organisms does the cell belong?

1. Cells  →  1.1. Cell structure and function

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28

By which process do producers obtain energy?

6. Plant nutrition  →  6.1. Photosynthesis

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

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29

The diagram shows a food web in a pond. Which of the organisms is a carnivore, which is a herbivore and which is a producer?

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 nitrogen cycle. Which process is carried out by decomposing bacteria?

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

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31

Which method of control would not be effective against the spread of the malarial parasite?

12. Disease and immunity  →  12.1. Disease

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32

A farmer spread inorganic fertiliser on his fields in a valley bordering a river. During heavy rainfall the fertiliser leached into the river. Several days later the fish in the river started to die. Which sequence of events led to the death of the fish?

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

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

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

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33

An insect carries pollen from one flower to another flower on the same plant. What is the type of reproduction and what is the type of pollination in this plant?

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

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34

The diagram shows the life cycle of a species of plant. During which stage does meiosis (reduction division) occur?

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

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

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35

Pregnant women are advised to eat a diet with enough protein, calcium and iron for the developing baby. Which needs are supplied by these constituents of food for the baby’s bones, growing tissues and red blood cells?

8. Human nutrition  →  8.1. Diet

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

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36

How are sperm cells different from egg cells in size and in number?

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

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37

The grids show the alleles and offspring of four pairs of parents. Which grid shows codominance amongst the offspring?

17. Inheritance  →  17.3. Inheritance

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38

What is the primary function of DNA?

17. Inheritance  →  17.2. DNA

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39

Two individuals are heterozygous for a particular gene. Which statements about their offspring are correct?

17. Inheritance  →  17.3. Inheritance

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40

The heights of 500 pea plants of the same age were measured to the nearest 20 cm. The results are shown...

17. Inheritance  →  17.1. Variation

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