---

---

1

Which organisms carry out respiration, growth, movement and excretion?

1. Characteristics and classification of living organisms  →  1.3. Features of organisms

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

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

Open

2

The diagram shows an animal whose scientific name is Falco peregrinus. To which species does it belong?

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

20. Human influences on ecosystems  →  20.2. Habitat destruction

Open

3

What kind of skin do amphibians have?

14. Coordination and response  →  14.4. Homeostasis

Open

4

The diagram shows a flowering plant. Use the key to identify the plant. flower has four petals plant leaves with jagged edges leaves with smooth edges B A flower has five petals leaves with jagged edges leaves with smooth edges D C

16. Reproduction  →  16.3. Sexual reproduction in plants

6. Plant nutrition  →  6.2. Leaf structure

Open

5

In which part of the cell does aerobic respiration occur?

12. Respiration  →  12.2. Aerobic respiration

12. Respiration  →  12.3. Anaerobic respiration

Open

6

Why do some root cells have root hairs?

8. Transport in plants  →  8.2. Water uptake

2. Organisation of the organism  →  2.1. Cell structure

Open

7

Which words correctly complete the paragraph?

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

3. Movement into and out of cells  →  3.3. Active transport

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

Open

8

Which part of a plant root hair is partially permeable?

8. Transport in plants  →  8.2. Water uptake

2. Organisation of the organism  →  2.1. Cell structure

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

Open

9

The table shows the results of food tests carried out on a fruit. test Benedict’s biuret ethanol iodine result positive positive negative negative What did the fruit contain?

4. Biological molecules  →  4.1. Biological molecules

7. Human nutrition  →  7.1. Diet

21. Biotechnology and genetic modification  →  21.2. Biotechnology

Open

10

An experiment was carried out to investigate the effect of pH on enzyme action. The graph shows the results. y-axis x-axis What are the labels for the x-axis and the y-axis?

5. Enzymes  →  5.1. Enzymes

Open

11

The equation for photosynthesis is shown...

6. Plant nutrition  →  6.1. Photosynthesis

12. Respiration  →  12.2. Aerobic respiration

Open

12

What is the best source of vitamin C in a balanced diet?

7. Human nutrition  →  7.1. Diet

Open

13

A young, active woman requires more of which constituent in her diet than a young, active man?

7. Human nutrition  →  7.1. Diet

9. Transport in animals  →  9.2. Heart

Open

14

Which condition could be caused by a lack of iron?

7. Human nutrition  →  7.1. Diet

10. Diseases and immunity  →  10.1. Diseases and immunity

Open

15

The diagram shows part of a section through a plant stem. Which tissue transports water from the roots to the leaves?

8. Transport in plants  →  8.2. Water uptake

Open

16

Petroleum jelly is waterproof and transparent. Covering the underside of the leaves of a plant with a thin layer of petroleum jelly will slow down the rate of water loss from the plant. Which statement explains this?

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

8. Transport in plants  →  8.2. Water uptake

Open

17

A student places two samples of crushed apple into two beakers, P and Q. The samples are of equal size. She adds 5 cm3 of pectinase solution to beaker P and 5 cm3 of water to beaker Q. After five minutes, she places the samples of crushed apple into two different filter funnels, and measures the volume of juice filtering through from each sample over a period of 10 minutes. Which graph shows her results?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

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

Open

18

During the process of blood clotting, damage to blood vessels stimulates L, and M is converted to N. What are L, M and N?

9. Transport in animals  →  9.4. Blood

Open

19

A child is vaccinated against measles. After a period of time the child is infected with the measles virus. The graph shows the concentration of measles antibodies in the child’s bloodstream during this time. antibody concentration in the blood time Which statement is consistent with the information in the graph?

10. Diseases and immunity  →  10.1. Diseases and immunity

Open

20

Muscles are responsible for the ventilation of the lungs during breathing. Which row describes their action during the inspiration of air?

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

Open

21

Yeast is able to respire both aerobically and anaerobically. Which statement describes the waste products of yeast respiration?

12. Respiration  →  12.3. Anaerobic respiration

21. Biotechnology and genetic modification  →  21.2. Biotechnology

Open

22

The table shows the presence or absence of chemicals in solution in different parts of a healthy kidney. Which row is correct?

13. Excretion in humans  →  13.1. Excretion in humans

Open

23

Four processes occur when impulses cross a synapse. P neurotransmitter diffuses across the gap Q neurotransmitter binds with receptors R impulse stimulates vesicles S release of neurotransmitter What is the correct sequence for these processes?

14. Coordination and response  →  14.1. Coordination and response

Open

24

Which hormone is involved in the conversion of glucose to glycogen?

14. Coordination and response  →  14.3. Hormones

14. Coordination and response  →  14.4. Homeostasis

Open

25

The diagram shows the structure of human skin. X Y Z What are X, Y and Z?

14. Coordination and response  →  14.4. Homeostasis

14. Coordination and response  →  14.1. Coordination and response

14. Coordination and response  →  14.2. Sense organs

Open

26

A seedling was placed in a horizontal position. Which diagram shows the result of the gravitropic responses in the seedling?

14. Coordination and response  →  14.5. Tropic responses

Open

27

Which hormone may be used to improve sporting performance?

14. Coordination and response  →  14.3. Hormones

16. Reproduction  →  16.5. Sex hormones in humans

Open

28

Specific grape varieties are maintained using stem cuttings from mature plants that are then planted and cultivated to produce grapes. This is an example of artificial asexual reproduction. What is a disadvantage of using asexual reproduction to produce fruit?

16. Reproduction  →  16.1. Asexual reproduction

16. Reproduction  →  16.3. Sexual reproduction in plants

Open

29

Which two statements are correct for the process of cross-pollination in plants?

16. Reproduction  →  16.3. Sexual reproduction in plants

Open

30

What is a function of the mitochondria in a sperm cell?

16. Reproduction  →  16.4. Sexual reproduction in humans

Open

31

The diagram shows the chromosomes in the nucleus of a body cell in an adult fruit fly. What are the diploid and haploid number of chromosomes in the fruit fly?

17. Inheritance  →  17.1. Chromosomes, genes and proteins

Open

32

The diagram shows the phenotypes for blood groups in a family. A A AB B O parents children key male female Which statement about the genotypes of the parents is correct?

17. Inheritance  →  17.4. Monohybrid inheritance

Open

33

Sickle-cell anaemia is a genetic disorder which results in severe illness in homozygous individuals. In some human populations being heterozygous can be beneficial. What could be the reason for this?

17. Inheritance  →  17.4. Monohybrid inheritance

Open

34

Which statement describes the relationship between evolution and natural selection?

18. Variation and selection  →  18.3. Selection

Open

35

The diagram shows a food chain. maize → locusts → lizards → snakes 10 000 kJ 1000 kJ 100 kJ 10 kJ What is the efficiency of energy transfer between the maize and the lizards in this food chain?

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

Open

36

The diagram shows part of a food web from a rainforest. fruits and leaves howler monkeys iguanas harpy eagles anacondas jaguars In this food web, at which trophic level are the anacondas?

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

Open

37

The diagram shows the structure of a bacterial cell. DNA X The presence of structure X in the bacterial cell is one reason why bacteria are used in genetic engineering. What is structure X?

2. Organisation of the organism  →  2.1. Cell structure

Open

38

What does Penicillium need to grow in a fermenter?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

6. Plant nutrition  →  6.1. Photosynthesis

Open

39

Deforestation can have a negative impact on the environment. Which statement about the negative impact of deforestation is correct?

20. Human influences on ecosystems  →  20.2. Habitat destruction

Open

40

When nitrates enter a lake they cause rapid growth of algae on the surface of the water. This causes the following changes in the lake: a decrease in the concentration of dissolved oxygen in the water fish and other aquatic animals die an increase in aerobic respiration by decomposers producers die and decomposition increases In which order do these changes occur?

20. Human influences on ecosystems  →  20.3. Pollution

19. Organisms and their environment  →  19.3. Nutrient cycles

6. Plant nutrition  →  6.1. Photosynthesis

Open