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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