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6. What is the role of hexokinase?

  • Converting glucose to fructose-6-phosphate
  • Trapping glucose within the cell by dephosphorlyation
  • Trapping glucose within the cell by phosphorylation
  • Transporting glucose into the cell by phosphorylation

7. What is the transport protein for glucose?

  • Hexokinase
  • GLUT
  • NADH
  • Acetyl-CoA

8. Which Kreb's cycle substrate inhibits the formation of acetyl-CoA

  • Isocitrate
  • Pyruvate
  • Acetyl-CoA
  • Malate

9. Which step of glycolysis generates 2NADH?

  • Aldol cleavage
  • 1st ATP production
  • Oxidation of GAP
  • Phosphorylation of glucose

10. What is a useless three carbon sugar molecule formed at the midpoint of glycolysis?

  • Glucose 6-phosphate
  • Dihydroxyacetone Phosphate (DHAP)
  • 1,3-bisphosphoglycerate
  • Glyceraldehyde-3-Phosphate (GAP)

11. What is the type of inhibition caused when a product inhibits it's own enzyme?

  • Product inhibition
  • Feedback inhibition
  • Competitive inhibition
  • Allosteric inhibition

12. What is the role of aldolase in glycolysis?

  • To divide glucose 6-phosphate into glyeraldehyde 3-phosphate
  • To isomerise glucose 6-phosphate into fructose 1,6-phosphate
  • To divide fructose 1,6-phosphate into glyeraldehyde 3-phosphate
  • To divide glucose 6-phosphate into fructose 1,6-phosphate

13. Adrenaline can directly influence which enzyme

  • Phosphofructokianse II
  • Hexose kinase
  • Phosphofructokinase I
  • Pyruvate kinase

14. What type of phosphorylation synthesises ATP using inorganic phosphate from a substrate

  • Kinase phosphorylation
  • Substrate-level phosphorylation
  • ATP phosphorylation
  • Oxidative phosphorylation

15. What is an example of an exergonic reaction?

  • Glucose -> Glucose 6-phosphate (using hexokinase)
  • ADP + Pi -> ATP (using ATP synthase)
  • Glucose 6-phosphate -> fructose 6-phosphate (using phosphoexose isomerase)
  • Fructose 1-6-phosphate -> GAP + DHAP (aldolase)

16. If phosphofructokinase is stimulated, what happens to the rate of hexokinase?

  • Increases
  • Decreases
  • Stays the same
  • None of these

17. What controls the rate of glycolysis?

  • Hexokinase
  • Insulin
  • Adrenaline
  • Glucagon

18. What cofactor does hexokinase require to work?

  • Magnesium
  • None
  • Managenese
  • Calcium

19. Which molecules inhibit the TCA cycle?

  • ATP, NADH, acetyl-CoA, citrate, succinyl CoA
  • ADP, NAD, ACetyl-CoA, citrate
  • ATP, NADH, CoASH, fumarate
  • FAD, NADPH, AMP

20. What is an endergonic reaction?

  • Positive change in free energy, nonspontaenous and absorption of energy
  • Negative change in free energy, spontaneous and absorption of energy
  • Positive change in free energy, spontaneous and release of energy
  • Negative change in free energy, nonspontaenous and release of energy