---

---

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

Open

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

Open

3

The diagram shows a plant cell. A biologist wants to find out the number of chromosomes it contains. Which labelled part should be examined more closely?

17. Inheritance  →  17.1. Chromosomes, genes and proteins

2. Organisation of the organism  →  2.1. Cell structure

Open

4

The diagram shows a human liver cell. M The length of structure M on the diagram is 6 mm. The magnification of the diagram is x 2000. What is the actual length of M?

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

Open

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

Open

6

An uncooked piece of potato was placed in a solution. After two hours the size of the piece of potato had decreased. Which row explains why this has happened and how the potato cells have changed?

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

2. Organisation of the organism  →  2.1. Cell structure

Open

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

Open

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

Open

9

The diagram shows the four types of human tooth. incisor canine premolar molar Which teeth are used for grinding food?

7. Human nutrition  →  7.3. Physical digestion

Open

10

Enzymes function best at their optimum temperature. Which statement describes the effect on an enzyme of increasing the temperature to the enzyme’s optimum temperature?

5. Enzymes  →  5.1. Enzymes

Open

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

Open

12

The diagram shows a plant cell. In which part of the cell does photosynthesis occur?

2. Organisation of the organism  →  2.1. Cell structure

6. Plant nutrition  →  6.1. Photosynthesis

Open

13

The graph shows the effect of pH on the activity of an enzyme. enzyme activity pH In which part of the alimentary canal would this enzyme be most active?

5. Enzymes  →  5.1. Enzymes

Open

14

The diagram shows the structure of a villus. The arteriole, capillary, lacteal and venule are labelled with letters. Which letter shows where nutrients are absorbed into the blood?

7. Human nutrition  →  7.5. Absorption

Open

15

Which change increases the rate of water uptake by the roots of a plant?

8. Transport in plants  →  8.2. Water uptake

Open

16

Dodder is a plant that grows on other plants called the hosts. The dodder plant connects to the host’s vascular bundles. The dodder plant does not have green leaves or roots. What correctly describes the regions for translocation?

8. Transport in plants  →  8.4. Translocation

Open

17

The diagrams show the single circulation of a fish and the double circulation of a mammal. gill capillaries body capillaries fish circulation lung capillaries body capillaries mammal circulation ventricle ventricles atrium R T S Y X Z atria Which letters represent areas of oxygenated blood?

9. Transport in animals  →  9.1. Circulatory systems

Open

18

The diagram shows the human heart and main blood vessels. lungs rest of body X What is the blood vessel labelled X?

9. Transport in animals  →  9.3. Blood vessels

9. Transport in animals  →  9.2. Heart

Open

19

The following are statements about immunity. The transfer of antibodies from mother to baby in breast milk is an example of passive immunity. Passive immunity results in long term immunity because of the production of memory cells. Active immunity is gained after vaccination with antigens. Which statements are correct?

10. Diseases and immunity  →  10.1. Diseases and immunity

Open

20

What is the site of gas exchange in humans?

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

Open

21

The substances listed are associated with aerobic respiration. carbon dioxide glucose oxygen water Which substances are the products of aerobic respiration?

12. Respiration  →  12.2. Aerobic respiration

Open

22

The formula C2H5OH represents a chemical produced during anaerobic respiration. What is this chemical?

12. Respiration  →  12.3. Anaerobic respiration

Open

23

What is filtered out of the blood in the glomerulus into the kidney tubule?

13. Excretion in humans  →  13.1. Excretion in humans

Open

24

Which responses occur in the iris of the eye when a person walks from a brightly lit area to a dimly lit area?

14. Coordination and response  →  14.2. Sense organs

Open

25

Which glands are endocrine glands?

14. Coordination and response  →  14.3. Hormones

16. Reproduction  →  16.5. Sex hormones in humans

Open

26

What are the effects of insulin and adrenaline on the concentration of blood glucose?

14. Coordination and response  →  14.4. Homeostasis

14. Coordination and response  →  14.3. Hormones

Open

27

Asexual reproduction can be used to produce crops. Why might a disease be likely to spread throughout the whole crop?

16. Reproduction  →  16.3. Sexual reproduction in plants

Open

28

In a comparison between the processes of artificial insemination (Aand in vitro fertilisation (IVF), which statement applies to IVF only?

20. Human influences on ecosystems  →  20.4. Conservation

16. Reproduction  →  16.4. Sexual reproduction in humans

Open

29

The diagram shows half a flower. There is a description of each numbered part. the stigma which receives pollen from insects the anther which produces smooth and light pollen grains the ovule where fertilisation occurs when the male and female nuclei fuse Which descriptions are correct for an insect-pollinated flower?

16. Reproduction  →  16.3. Sexual reproduction in plants

Open

30

What is a diploid nucleus?

17. Inheritance  →  17.1. Chromosomes, genes and proteins

16. Reproduction  →  16.2. Sexual reproduction

Open

31

Which statement about meiosis is correct?

17. Inheritance  →  17.3. Meiosis

17. Inheritance  →  17.2. Mitosis

Open

32

The diagram shows the inheritance of height in pea plants. tall parent plant TT tall offspring plant Tt tall offspring plant Tt dwarf parent plant tt Which plants have a heterozygous genotype?

17. Inheritance  →  17.4. Monohybrid inheritance

Open

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

Open

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

Open

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

Open

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

Open

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

Open

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

Open

39

Which is a reason for using bacteria in biotechnology?

21. Biotechnology and genetic modification  →  21.1. Biotechnology and genetic modification

15. Drugs  →  15.1. Drugs

Open

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

Open