1. Glycolysis

3. Step 1 2 ATP molecules donate 2 phosphates to the glucose molecule Glucose contains 6 carbon molecules Glucose C-C-C-C-C-C 2 ATP P-C-C-C-C-C-C-P 6 carbon compound

4. Stage 2  After the phosphate has been added the entire glucose phosphate molecule gets reorganized to form a fructose phosphate molecule.

5. Step 2 6 carbon molecule split into 2 molecules P-C-C-C-C-C-C-P 6 carbon compound PGAL P-C-C-C C-C-C-P

6. Step 2 6 carbon molecule split into 2 molecules P-C-C-C-C-C-C-P 6 carbon compound PGAL P-C-C-C C-C-C-P

7. Step 3 2 NAD + The 2 molecules of PGAL join with 2 NAD + ions Forming 2 new 3C molecules 2 molecules of 3 Carbon compounds P-C-C-C C-C-C-P 2 NADH +2H + 2 Phosphate 2 molecules of PGAL P-C-C-C-P P- C-C-C-P

8. Step 4 4 ADP 4 molecules of ADP combine with the 2- molecules from step 3 This produces pyruvic acid AND 4 ATD 2 molecules of 3 Carbon compounds P-C-C-C-P P- C-C-C-P 4 ATP 2 molecules pyruvic acid C-C-C

9.  Simply put-  Glucose + 2 ATP = 2 Pyruvic acid + 4 ATP