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1

Some yeast, sugar and water are mixed in a test-tube. The diagrams show the test-tube at the start and after one hour. at start after one hour yeast, sugar and water bubbles of gas Which process causes this change?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

12. Respiration  →  12.1. Respiration

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2

Which diagram shows a flower from a monocotyledon?

16. Reproduction  →  16.3. Sexual reproduction in plants

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3

In which part of the cell is oxygen used to release energy from nutrient molecules?

6. Plant nutrition  →  6.1. Photosynthesis

12. Respiration  →  12.3. Anaerobic respiration

12. Respiration  →  12.2. Aerobic respiration

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4

The actual thickness of the leaf shown...

2. Organisation of the organism  →  2.2. Size of specimens

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5

The diagram shows two cells. The net movement of water is from cell X to cell Y. cell X cell Y water What causes water to pass from cell X to cell Y?

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

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6

For the stomata of a leaf to open, the guard cells accumulate more potassium ions than the surrounding cells. Which row describes what happens?

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

8. Transport in plants  →  8.2. Water uptake

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7

The structures of antibodies, DNA molecules and enzymes are specific to their actions. Which feature of each molecule makes it specific?

5. Enzymes  →  5.1. Enzymes

10. Diseases and immunity  →  10.1. Diseases and immunity

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8

Small molecules are used as the basic units in the synthesis of large food molecules. Which statement is correct?

4. Biological molecules  →  4.1. Biological molecules

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9

A food stain on a table cloth is where meat cooked in oil has been spilt. It is washed in a biological washing powder. Which combination of enzymes should be in the washing powder to remove the stain?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

7. Human nutrition  →  7.4. Chemical digestion

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10

Which graph shows the effect of temperature on the activity of an enzyme?

5. Enzymes  →  5.1. Enzymes

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11

When a tissue from a man is grafted onto a woman it may be rejected by the woman’s body. What is the main cause of this rejection?

16. Reproduction  →  16.4. Sexual reproduction in humans

9. Transport in animals  →  9.4. Blood

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12

The diagram shows a potted plant and the same plant 24 hours later. 24 hours What causes the change in the appearance of the plant?

8. Transport in plants  →  8.3. Transpiration

8. Transport in plants  →  8.2. Water uptake

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13

Which graph shows most clearly what will happen to the rate of transpiration as humidity increases?

8. Transport in plants  →  8.3. Transpiration

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14

Which process is an example of translocation?

8. Transport in plants  →  8.3. Transpiration

8. Transport in plants  →  8.4. Translocation

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15

The diagram shows a section through the human heart. Which is the right atrioventricular valve?

9. Transport in animals  →  9.2. Heart

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16

What is the fluid in the blood called?

9. Transport in animals  →  9.4. Blood

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17

The antibodies that give immunity to a disease can be acquired in the following different ways. feeding on breast milk infection by disease vaccination Which give active immunity?

10. Diseases and immunity  →  10.1. Diseases and immunity

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18

Which actions increase the volume of the thorax during breathing?

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

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19

What are the approximate percentages of oxygen and carbon dioxide in atmospheric air?

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

12. Respiration  →  12.2. Aerobic respiration

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20

Which processes depend on the action of enzymes?

5. Enzymes  →  5.1. Enzymes

7. Human nutrition  →  7.4. Chemical digestion

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21

Lactic acid builds up in the muscles during vigorous exercise. During recovery, how is this lactic acid removed?

12. Respiration  →  12.3. Anaerobic respiration

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22

Which diet will cause the liver to produce the most urea?

13. Excretion in humans  →  13.1. Excretion in humans

7. Human nutrition  →  7.1. Diet

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23

The diagram represents a simple reflex arc. finger R Q spinal cord P muscle pin What is the sequence of nerve cells through which an impulse passes during a reflex action?

14. Coordination and response  →  14.1. Coordination and response

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24

What are the effects of adrenaline?

14. Coordination and response  →  14.3. Hormones

9. Transport in animals  →  9.2. Heart

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25

The diagram shows the density of rods and cones across a horizontal section of the retina. What is the position of the optic nerve?

14. Coordination and response  →  14.2. Sense organs

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26

Which statement about antibiotics is not correct?

15. Drugs  →  15.1. Drugs

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27

In which conditions will seeds germinate most quickly?

16. Reproduction  →  16.3. Sexual reproduction in plants

6. Plant nutrition  →  6.1. Photosynthesis

21. Biotechnology and genetic modification  →  21.2. Biotechnology

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28

What are the characteristics of asexual reproduction?

16. Reproduction  →  16.2. Sexual reproduction

16. Reproduction  →  16.4. Sexual reproduction in humans

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29

Where are oestrogen and progesterone produced during the menstrual cycle?

16. Reproduction  →  16.5. Sex hormones in humans

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30

Which structure will be found in the nucleus of a body cell in a woman?

17. Inheritance  →  17.1. Chromosomes, genes and proteins

17. Inheritance  →  17.4. Monohybrid inheritance

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31

When a cell divides, these events occur. The DNA inside the cell is duplicated exactly. Daughter cells are produced with the same chromosome number as the parent cell. Which type of division has occurred?

17. Inheritance  →  17.2. Mitosis

17. Inheritance  →  17.3. Meiosis

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32

In the inheritance of ABO blood groups, when two parents have the genotypes IAIA and IAIo, what is the blood group of their offspring?

17. Inheritance  →  17.4. Monohybrid inheritance

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33

The diagram shows a hydrophyte in a river. surface of water floating leaves submerged leaves direction of water flow Which statement about the submerged leaves is correct?

8. Transport in plants  →  8.3. Transpiration

6. Plant nutrition  →  6.2. Leaf structure

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

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34

Some disease-causing bacteria survive treatment with an antibiotic. Which statement about the surviving bacteria is correct?

18. Variation and selection  →  18.3. Selection

15. Drugs  →  15.1. Drugs

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35

The diagram shows a pyramid of biomass for a food chain in a woodland ecosystem. fleas birds insects trees What is the pyramid of numbers for this food chain?

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

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36

In the food chain below, the population of snakes is halved owing to a viral disease. grass → locusts → snakes → eagles What effect does this have on the other members of the food chain?

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

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37

A gene for insulin is taken from a human cell and placed in a bacterium. The bacterium can then make human insulin. What is this process called?

18. Variation and selection  →  18.3. Selection

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38

When human DNA is inserted into the plasmid DNA of bacteria, which enzyme is used to cut the DNA?

21. Biotechnology and genetic modification  →  21.3. Genetic modification

17. Inheritance  →  17.1. Chromosomes, genes and proteins

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39

The diagram shows the positions of four farms and the concentrations of nitrate at different points in a river. Which farm is likely to have been using too much fertiliser on its land?

20. Human influences on ecosystems  →  20.3. Pollution

20. Human influences on ecosystems  →  20.1. Food supply

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40

A large amount of herbicide is applied to a field. However, some of the herbicide is washed into a nearby lake. What is the effect of the herbicide on the weeds in the field and on the plants in the lake?

20. Human influences on ecosystems  →  20.3. Pollution

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

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