1. GCSE Science Revision Quizzes
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2. Which one of these processes is NOT increasing the level of carbon dioxide in the atmosphere?
increased use of wind power
increased industrialisation
increased deforestation
increased world human population

3. d) increased use of wind power

4. 2. The reason why identical twins look alike is because they have:
different alleles and a similar environment
b) different alleles and a different environment
c) the same alleles and a similar environment
the same alleles and a different environment

5. c) the same alleles and a similar environment

6. 3. Which of the following is not an adaptation
to living in arctic conditions?
small ears of arctic foxes
thick layer of body fat in seals
white fur of polar bears
large fins of fish

7. d) large fins of fish

8. 4. Which genetic modification to plants
directly benefits human health?
a) resistance to insects
b) drought tolerance
c) herbicide resistance
d) vitamin A production

9. d) vitamin A production

10. 5. Which of the following is not
a cause of extinction?
new diseases
mutation
new predators
changes in habitats

11. b) mutation

12. 6. The removal of the insulin gene from
the human cell is carried out by:
a virus
a bacterium
an enzyme
a hormone

13. c) an enzyme

14. 7. Which human activity has increased the
release of methane into the atmosphere?
burning fossil fuels
cutting down forests
growing rice
using pesticides

15. c) growing rice

16. 8. Animals containing genes from other organisms are known as:
hybrid animals
cloned animals
transnucleic animals
transgenic animals

17. d) transgenic animals

18. 9. Children always inherit:
an equal number of genes from each parent
more genes from their mother
more genes from their father
all of their genes from their mother

19. a) an equal number of genes from each parent

20. 10. Charles Darwin suggested that:
humans evolved from monkeys
humans and monkeys have exactly the same genes
monkeys were humans’ main competitors
humans and monkeys had a common ancestor

21. d) humans and monkeys had a common ancestor

22. 11. Which of these statements raises ethical concerns?
Cloning could lead to greater food production
Cloning could help to produce better farm animals
Cloning might produce offspring with physical
and mental problems
d) Cloning could help to save endangered species

23. c) Cloning might produce offspring with physical and mental problems

24. 12. An increase in greenhouse gases leads
to global warming because:
less heat escapes from the atmosphere back into space
more heat escapes from the atmosphere back into space
more heat from the Sun is absorbed by the atmosphere
chemical reactions of greenhouse gases generate extra heat

25. a) less heat escapes from the atmosphere back into space

26. 13. A fertiliser is:
solid and liquid waste produced by cows
a chemical sprayed on crops to kill insects
a chemical sprayed on land to kill weeds
a chemical spread on land to increase crop growth

27. d) a chemical spread on land to increase crop growth

28. 14. Which of the following is NOT a reason for genetically modifying crops?
to improve resistance to pests
to increase diversity in nature
to increase crop yield
to improve the shelf life of produce

29. b) to increase diversity in nature

30. 15. Scientists think that the earliest life
forms first appeared on Earth:
about 1 million years ago
about 3 million years ago
about 1 billion years ago
about 3 billion years ago

31. d) about 3 billion years ago

32. 16. A mutation is:
a bad feature that we inherit
an adaptation to a new environment
a gene which has been changed by scientists
a random change in the DNA sequence

33. d) a random change in the DNA sequence

34. 17. Natural selection is when organisms with:
no genetic mutations survive to breed
the most genetic mutations survive to breed
the best adaptations survive to breed
the best adaptations survive but do not breed

35. c) the best adaptations survive to breed

36. 18. A survey found that 20% of overweight children had parents who were also overweight. What can be concluded from this data?
that obesity is caused by the environment
that obesity is inherited
that obesity is inherited but it is also influenced
by the environment
d) no definite conclusion can be made

37. d) no definite conclusion can be made

38. 19. Cacti have a thick waxy cuticle and store water in their stems
19. Cacti have a thick waxy cuticle and store water in their stems. These features are known as:
variations
speciations
modifications
adaptations

39. d) adaptations

40. 20. The shape of a DNA molecule is:
a double helix
a triple helix
a single spiral
tubular

41. a) a double helix