The function of the Calvin cycle is to take CO2 from the air and bond it together to form the molecules that will make the sugar glucose. This process is called carbon fixation . The actual result of the Calvin cycle is not glucose, a 6-carbon sugar, but another molecule called G3P. G3P is an abbreviation for glyceraldehyde-3-phosphate. This molecule is later converted by other chemical reactions into glucose.
During glycolysis, glucose ultimately breaks down into pyruvate and energy; a total of 2 ATP is derived in the process (Glucose + 2 NAD+ + 2 ADP + 2 Pi --> 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O)
