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Glycolysis
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 1
Cell pool of
ATP
ATP
Glucose-6-phosphate
Glucose
Cell pool of
ADP
ADP
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2. Glycolysis Step 2 4 5 1 2 3 glucose 2 2 2 2 2 acid 6 7 8 9 10 ATP
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 2
Cell pool of
ATP
Fructose-6-phosphate
Glucose-6-phosphate
Cell pool of
ADP

3. Glycolysis Step 3 1 2 3 4 5 glucose 2 2 2 2 2 acid 6 7 8 9 10 ATP ATP
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 3
Cell pool of
ATP
ATP
Fructose-6-phosphate
Fructose-1,6-diphosphate
Cell pool of
ADP
ADP

4. Glycolysis Step 4 4 5 1 2 3 glucose 2 2 2 2 2 acid 6 7 8 9 10 ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 4
Cell pool of
ATP
Glyceraldehyde-3-
phosphate
Fructose-1,6-diphosphate
Dihyroxyacetone
phosphate
Cell pool of
ADP

5. Glycolysis Step 5 1 2 3 4 5 glucose 2 2 2 2 2 acid 6 7 8 9 10 ATP
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 5
Cell pool of
ATP
Glyceraldehyde-3-
phosphate
Glyceraldehyde-3-
phosphate
Dihyroxyacetone
phosphate
Cell pool of
ADP

6. Glycolysis Step 6 1 2 3 4 5 glucose 2 2 2 2 2 acid 6 7 8 9 10 ATP NADH
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 6
Cell pool of
ATP
Cell pool of
NADH
NADH
1,3 diphosphoglycerate
Glyceraldehyde-3-
phosphate
Cell pool of
ADP
Cell pool of
NAD+
NAD+

7. Glycolysis Step 7 1 2 3 4 5 glucose 2 2 2 2 2 acid 6 7 8 9 10 ATP NADH
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 7
Cell pool of
ATP
Cell pool of
NADH
ATP
NAD+
1,3 diphosphoglycerate
3 phosphoglycerate
Cell pool of
ADP
Cell pool of
NAD+
ADP
NAD+

8. Glycolysis Step 8 1 2 3 4 5 glucose 2 2 2 2 2 acid 6 7 8 9 10 ATP NADH
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 8
Cell pool of
ATP
Cell pool of
NADH
ATP
NAD+
3 phosphoglycerate
2 phosphoglycerate
Cell pool of
ADP
Cell pool of
NAD+
ADP
NAD+

9. Glycolysis Mg++ Enolase Step 9 1 2 3 4 5 glucose 2 2 2 2 2 acid
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 9
Enolase
Mg++
Cell pool of
ATP
Cell pool of
NADH
ATP
H2O
NAD+
phosphoenolpyruvate
2 phosphoglycerate
Cell pool of
ADP
Cell pool of
NAD+
ADP
NAD+

10. under aerobic conditions
Glycolysis
2ADP 2ATP
2ADP 2ATP
glucose P
2 pyruvic
acid
ATP ADP
ATP ADP
2NAD+ 2NADH
Step 10
Cell pool of
ATP
Cell pool of
NADH
ATP
NAD+
Pyruvic acid
phosphoenolpyruvate
Cell pool of
ADP
Cell pool of
NAD+
ADP
NAD+
yeast cell
under anaerobic
conditions
under aerobic conditions
run “Kreb’s cycle”

11. Fermentation C6H12O6 2C2H6O + 2CO2 pyruvic acid acetaldehyde 4 5 1 2 3
glucose
ATP ADP
2NAD+ 2NADH
2ADP 2ATP P
2 pyruvic
acid
2NADH 2NAD+
2CO2
2ethanol
Cell pool of
ATP
Cell pool of
NADH
CO2
ATP
NAD+
pyruvic acid
acetaldehyde
Cell pool of
ADP
Cell pool of
NAD+
ADP
NAD+

12. Fermentation C6H12O6 2C2H6O + 2CO2 acetaldehyde ethanol
glucose
ATP ADP
2NAD+ 2NADH
2ADP 2ATP P
2 pyruvic
acid
2CO2
2ethanol
2NADH 2NAD+
Cell pool of
ATP
Cell pool of
NADH
ATP
NADH
NAD+
acetaldehyde
ethanol
Cell pool of
ADP
Cell pool of
NAD+
ADP
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