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- 1. Multiple Choice
Which process involves the release of energy from food substances in all living cells?
breathing
nutrition
respiration
digestion
- 2. Multiple Choice
Which of the four vertebrates in the table is a mammal?
A
B
C
D
- 3. Multiple Choice
Which of the four vertebrates in the table is a mammal? What is the name of this animal according to the binomial system?
Catus
Felis leo
Male African lion
Top African jungle carnivore
- 4. Multiple Choice
The diagram shows a fish. Which letter is the fish?
A
B
C
D
- 5. Multiple Choice
Which of the following is a sperm cell?
A
B
C
D
- 6. Multiple Choice
The diagram shows a fish.
The diagram shows a fish.
a jelly-like substance
a surrounding wall
a tiny green disc
- 7. Multiple Choice
The diagram shows some of the structures found in the human abdomen.
A
B
C
D
- 8. Multiple Choice
Cilia are present on the surface of the cells of the trachea. The cilia of a smoker work less effectively than those of a non-smoker.
How does this affect the smoker?
Less carbon dioxide is released.
Less oxygen is released.
More bacteria enter the lungs.
More mucus is removed from the lungs.
- 9. Multiple Choice
What is an example of osmosis?
Carbon dioxide goes out through the stomata of a leaf.
Digested food is absorbed from the small intestine.
Oxygen goes into the blood from an alveolus.
Water enters a plant root from the soil.
- 10. Multiple Choice
The diagram shows an experiment on diffusion. More sugar diffuses out of the bag than diffuses in.
What is the concentration of sugar in solution X?
10%
20%
30%
40%
- 11. Multiple Choice
The temperature of an enzyme-controlled reaction is increased by 10°C.
How does this affect the rate of reaction?
It always increases the rate.
It always decreases the rate.
It may increase or decrease the rate.
It has no effect on the rate.
- 12. Multiple Choice
An enzyme from the stomach that digests protein, and cooked egg white that contains protein, are placed in four test-tubes.
When the egg white is digested the mixture becomes clear.
Which tube becomes clear first?
A
B
C
D
- 13. Multiple Choice
The diagrams show the arrangement of cells in a section of a green leaf.
Which arrow represents the diffusion of the most oxygen during bright sunlight?
- 14. Multiple Choice
Which elements do carbohydrates contain?
carbon, hydrogen and oxygen
carbon, hydrogen and sulfur
carbon, nitrogen and oxygen
carbon, nitrogen and sulfur
- 15. Multiple Choice
What is a function of the human blood system?
carrying eggs from the ovary to the uterus
carrying glucose from the gut to the liver
carrying partly digested food from the mouth to the stomach
carrying urine from the kidney to the bladder
- 16. Multiple Choice
What is defined as the chemical reactions that break down food molecules in cells to release energy?
excretion
movement
digestion
respiration
- 17. Multiple Choice
The graph shows how the rate of an enzyme-controlled reaction changes with temperature. What is happening within the temperature range marked X?
The enzyme is becoming denatured.
The enzyme is becoming denatured.
The reaction is occurring at body temperature.
The reaction is occurring at the optimum temperature.
- 18. Multiple Choice
The diagram shows someone blowing up a balloon. What percentage of the gas in the balloon is carbon dioxide?
0.04%
0.4%
4.0%
40%
- 19. Multiple Choice
Which organ produces urea?
bladder
kidneys
liver
lungs
- 20. Multiple Choice
What term is used for the transference of a gene from one organism to another?
artificial selection
genetic engineering
mutation
natural selection
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