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6. Describes how an organism fits into its environment and its role.

  • Community
  • Population
  • Ecological niche
  • Habitat

7. How many ATP molecules are produced at the end of glycolysis?

  • 0
  • 2
  • 4
  • 6

8. Acetyl CoA combines with what molecule to form a 6C molecule?

  • 2C
  • 5C
  • 4C
  • 3C

9. How many times must the calvin cycle take place to produce one molecules of glucose?

  • 4
  • 5
  • 6
  • 3

10. What must happen during speciation for the gene pools to become different?

  • A mutation must be selected for by the environment.
  • The environment must change.
  • A mutation must occur.
  • Reproductive isolation.

11. Intraspecific competition is...

  • between the same species
  • between different species

12. Which of these in an effect of using nitrogen-containing fertilisers?

  • All 3
  • reduced species diversity
  • leaching
  • eutrophication

13. Which of these is a feature of intensive rearing?

  • High protein food
  • Warm environment
  • All of these
  • Restricted movement

14. How many molecules of ATP are formed in the Krebs cycle?

  • 3
  • 1
  • 2
  • 4

15. Where does the electron transport chain take place?

  • cristae
  • matrix
  • cytoplasm

16. What genetic diseases most often result in males being affected while women can be carriers?

  • Sex linked genes (to the X chromosome)
  • Sex linked genes (to the Y chromosome)
  • Dominant genes
  • Recessive genes

17. What does acetate combine with in the link reaction?

  • Coenzyme X
  • Coenzyme B
  • Coenzyme A
  • Coenzyme C