In aerobic respiration, glycolysis is linked with Krebs’ cycle through acetyl Co-A because pyruvic acid (end-product of glycolysis) first converted into acetyl Co-A. The acetyl Co-A enters in the Krebs’ cycle. The formation of acetyl Co-A is involved with some cofactors like Mg ions, thiamine pyrophosphate (Vitamin-$B_{1}$), NAD⁺ , Co-A and lipoic acid.