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1

The diagram shows what happened in an experiment with plant seedlings. start light next day light Which characteristic of living things made the seedlings grow towards the light?

14. Coordination and response  →  14.5. Tropic responses

1. Characteristics and classification of living organisms  →  1.1. Characteristics of living organisms

6. Plant nutrition  →  6.1. Photosynthesis

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2

A rat has the scientific name Rattus rattus. What do the two parts of this name refer to?

1. Characteristics and classification of living organisms  →  1.2. Concept and uses of classification systems

20. Human influences on ecosystems  →  20.4. Conservation

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3

The diagram shows two guard cells. Which label shows the cell wall?

2. Organisation of the organism  →  2.1. Cell structure

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4

The diagrams show different levels of organisation in a plant. (Not drawn to scale.) Which sequence shows the levels of organisation in order from smallest to largest?

19. Organisms and their environment  →  19.2. Food chains and food webs

6. Plant nutrition  →  6.2. Leaf structure

8. Transport in plants  →  8.1. Xylem and phloem

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5

Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?

3. Movement into and out of cells  →  3.2. Osmosis

8. Transport in plants  →  8.4. Translocation

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6

Plant cells are placed in a solution with a higher water potential than the plant cell contents. What will happen?

3. Movement into and out of cells  →  3.2. Osmosis

8. Transport in plants  →  8.2. Water uptake

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7

The diagram shows a section of DNA, with four bases identified on one strand. G A C T Which sequence of bases would be on the other strand, starting from the top?

17. Inheritance  →  17.1. Chromosomes, genes and proteins

4. Biological molecules  →  4.1. Biological molecules

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8

Which food-testing solution shows a positive result when it turns from blue to purple?

4. Biological molecules  →  4.1. Biological molecules

5. Enzymes  →  5.1. Enzymes

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9

What is the definition of an enzyme?

5. Enzymes  →  5.1. Enzymes

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10

An experiment is set up to investigate gas exchange in aquatic plants. aquatic plant hydrogencarbonate indicator solution light The hydrogencarbonate indicator solution is orange at the start. Which colour is it after three hours?

6. Plant nutrition  →  6.1. Photosynthesis

11. Gas exchange in humans  →  11.1. Gas exchange in humans

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11

The diagram shows how the rate of photosynthesis varies with light intensity. The four curves show different conditions of temperature and carbon dioxide concentration. rate of photosynthesis light intensity 30 °C, 0.2% CO2 20 °C, 0.2% CO2 30 °C, 0.1% CO2 20 °C, 0.1% CO2 P What limits the rate of photosynthesis at point P?

6. Plant nutrition  →  6.1. Photosynthesis

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12

Four test-tubes are set up as shown...

6. Plant nutrition  →  6.1. Photosynthesis

11. Gas exchange in humans  →  11.1. Gas exchange in humans

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13

The activity of amylase is measured in four parts of the alimentary canal. Which two parts have the most amylase activity?

7. Human nutrition  →  7.2. Digestive system

7. Human nutrition  →  7.4. Chemical digestion

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14

Biological washing powder can be used to remove stains on clothing. Which enzymes will remove stains caused by starch, fat and protein?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

7. Human nutrition  →  7.4. Chemical digestion

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15

The graph shows the rate of uptake of magnesium ions by two similar plants, X and Y. The roots of each plant were placed in a range of solutions. Each solution contained a different concentration of magnesium ions. All other conditions were kept constant. rate of uptake of ions concentration of magnesium ions in external solution plant X plant Y What is a possible explanation for the difference in the results for the two plants?

3. Movement into and out of cells  →  3.2. Osmosis

8. Transport in plants  →  8.2. Water uptake

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16

What will increase the rate of transpiration in a plant?

8. Transport in plants  →  8.3. Transpiration

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17

Which pathway is taken by blood in a fish?

9. Transport in animals  →  9.2. Heart

9. Transport in animals  →  9.1. Circulatory systems

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18

The diagram shows a section through the heart and its blood vessels. X Which row gives the vessel name and the direction of blood flow in vessel X?

9. Transport in animals  →  9.3. Blood vessels

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19

When a pathogen enters the blood, the immune system uses different mechanisms to destroy the pathogen. The diagram shows one of these mechanisms. X Y pathogen Which row describes the structures involved?

9. Transport in animals  →  9.4. Blood

10. Diseases and immunity  →  10.1. Diseases and immunity

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20

What is the approximate percentage of oxygen contained in the air breathed out of the lungs?

11. Gas exchange in humans  →  11.1. Gas exchange in humans

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21

The diagram shows an experiment to investigate the respiration of yeast. Oil prevents oxygen entering the glucose and yeast suspension. delivery tube limewater bubble of gas thin layer of oil glucose and yeast suspension If no oxygen is present in the glucose and yeast suspension, what will occur?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

12. Respiration  →  12.1. Respiration

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22

Which row correctly completes the balanced equation for aerobic respiration?

12. Respiration  →  12.2. Aerobic respiration

6. Plant nutrition  →  6.1. Photosynthesis

12. Respiration  →  12.3. Anaerobic respiration

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23

In healthy people, which substance is completely reabsorbed into the blood from the kidney tubules?

13. Excretion in humans  →  13.1. Excretion in humans

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24

The diagram shows a synapse. W X Y Z nerve ending of neurone 1 membrane of neurone 2 What are the labelled parts?

14. Coordination and response  →  14.1. Coordination and response

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25

Which row shows the actions needed for the eye to focus on a distant object?

14. Coordination and response  →  14.2. Sense organs

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26

The liver and the pancreas work together to control the concentration of glucose in the blood. Which statement is correct?

14. Coordination and response  →  14.4. Homeostasis

14. Coordination and response  →  14.3. Hormones

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27

The statements are about the use of antibiotics. using an antibiotic to prevent infection using an antibiotic known to kill the bacteria causing an infection using an antibiotic only when essential using an antibiotic to treat a viral infection Which practices will increase the chance of the development of antibiotic resistance in bacteria?

15. Drugs  →  15.1. Drugs

18. Variation and selection  →  18.3. Selection

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28

Which description of cross-pollination is correct?

16. Reproduction  →  16.3. Sexual reproduction in plants

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29

The diagram shows a sperm cell. Which part contains enzymes that digest the jelly coat of an egg cell?

16. Reproduction  →  16.4. Sexual reproduction in humans

5. Enzymes  →  5.1. Enzymes

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30

Which cell contains a haploid nucleus?

17. Inheritance  →  17.1. Chromosomes, genes and proteins

16. Reproduction  →  16.2. Sexual reproduction

2. Organisation of the organism  →  2.1. Cell structure

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31

The diagram shows the chromosomes of four daughter cells produced by meiosis. Which parent cell produced these cells?

17. Inheritance  →  17.3. Meiosis

17. Inheritance  →  17.2. Mitosis

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32

When damaged tissues are repaired cells undergo division by A meiosis to produce genetically identical cells. B meiosis to produce genetically different cells. C mitosis to produce genetically identical cells. D mitosis to produce genetically different cells.

17. Inheritance  →  17.2. Mitosis

2. Organisation of the organism  →  2.1. Cell structure

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33

The graph shows the masses of two different types of tomato. 80 100 120 140 160 180 200 220 240 number of tomatoes mass / g type 1 type 2 What can be concluded from the graph?

18. Variation and selection  →  18.1. Variation

17. Inheritance  →  17.4. Monohybrid inheritance

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34

Which adaptation may be present in a xerophyte?

6. Plant nutrition  →  6.2. Leaf structure

18. Variation and selection  →  18.2. Adaptive features

8. Transport in plants  →  8.1. Xylem and phloem

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35

The diagram shows a food chain in a rock pool. seaweed → whelks → crabs → seagulls What will happen if the number of secondary consumers increases?

19. Organisms and their environment  →  19.2. Food chains and food webs

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36

What is defined as ‘all of the populations of different species in an ecosystem’?

19. Organisms and their environment  →  19.4. Populations

20. Human influences on ecosystems  →  20.2. Habitat destruction

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37

What is the role of anaerobic respiration in bread-making?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

12. Respiration  →  12.3. Anaerobic respiration

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38

A crop plant has been genetically modified to make it resistant to herbicides. Which is a possible disadvantage of introducing this new crop plant?

21. Biotechnology and genetic modification  →  21.3. Genetic modification

20. Human influences on ecosystems  →  20.1. Food supply

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39

Which process in the nitrogen cycle is involved in the breakdown of amino acids in living organisms?

19. Organisms and their environment  →  19.3. Nutrient cycles

13. Excretion in humans  →  13.1. Excretion in humans

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40

When a river is polluted by fertiliser, the following processes may occur. increased aerobic respiration of decomposers increased growth of producers decreased oxygen concentration in the water What is the correct sequence for these processes?

20. Human influences on ecosystems  →  20.3. Pollution

8. Transport in plants  →  8.3. Transpiration

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