5.2.2a Glycolysis and the link reaction Quiz: OCR Biology, Unit 6

The 20 questions

1. In which part of the cell does glycolysis take place?

   • Thylakoid lumen
   • Mitochondrial matrix
   • Inner mitochondrial membrane
   • Cytoplasm

2. What is the net yield of ATP from glycolysis per glucose molecule?

   • 2
   • 0
   • 4
   • 36

3. How many triose phosphate molecules are produced from splitting one hexose bisphosphate molecule?

   • Two
   • One
   • Four
   • Three

4. Where does the link reaction take place?

   • Lysosome
   • Mitochondrial matrix
   • Outer mitochondrial membrane
   • Cytoplasm

5. What is the main product of the link reaction that enters the Krebs cycle?

   • Citrate
   • Oxaloacetate
   • Lactate
   • Acetyl CoA

6. Which gas is released during the decarboxylation of pyruvate in the link reaction?

   • Carbon dioxide
   • Methane
   • Nitrogen
   • Oxygen

7. Which coenzyme is reduced during glycolysis, in addition to forming ATP?

   • Oxygen
   • Acetyl CoA
   • Carbon dioxide
   • NAD

8. How many molecules of reduced NAD are produced by glycolysis from one glucose molecule?

   • 2
   • 1
   • 4
   • 6

9. How many molecules of carbon dioxide are released by the link reaction per glucose molecule?

   • 0
   • 4
   • 6
   • 2

10. Which enzyme catalyses the phosphorylation of glucose during the investment phase of glycolysis?

    • Hexokinase
    • DNA polymerase
    • Rubisco
    • ATP synthase

11. Three glucose molecules are respired by glycolysis alone. What is the total net yield of ATP?

    • 12
    • 9
    • 6
    • 3

12. A glucose molecule contains six carbon atoms. How many carbon atoms does each pyruvate contain?

    • 3
    • 6
    • 2
    • 4

13. Which initial step of glycolysis requires the consumption of ATP?

    • Splitting of triose
    • Formation of pyruvate
    • Reduction of NAD
    • Phosphorylation of glucose

14. Acetyl CoA produced by the link reaction enters which cycle?

    • Krebs cycle
    • Urea cycle
    • Calvin cycle
    • Glycolysis

15. Per pyruvate molecule, how many reduced NAD molecules are produced in the link reaction?

    • Four
    • One
    • Two
    • Three

16. What is the net yield of ATP per glucose molecule during glycolysis?

    • Thirty-two ATP
    • Thirty-six ATP
    • Four ATP
    • Two ATP

17. Glycolysis and the link reaction together produce how many molecules of reduced NAD per glucose molecule?

    • 6
    • 4
    • 2
    • 8

18. How many ATP molecules are used during the energy investment phase of glycolysis?

    • Three
    • Four
    • One
    • Two

19. Which coenzyme accepts hydrogen in both glycolysis and the link reaction?

    • Coenzyme A
    • FAD
    • NAD
    • Haemoglobin

20. Where in a eukaryotic cell does glycolysis take place?

    • Mitochondrial matrix
    • Cytoplasm
    • Intermembrane space
    • Cristae

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