Answer:
The main product in the first step of cellular respiration is Pyruvate.
Step-by-step explanation:
Cellular respiration invove 3 major steps the first step is glycolysis,the second step is TCA cycle and the last step is oxidative phosphorylation.
As Glycolysis is the first step of Aerobic respiration the main product of that step is Pyruvate which is the end product of Glycolysis.