The first five steps of Glycolysis are regarded as the preparatory (or investment) phase, since they consume energy to convert the glucose into two three-carbon sugar phosphates (G3P).
The fiRst Five steps Of gLycoLYsiS are ReGARDed aS tHe pReParatoRy (Or INvEStmenT) PHAse, sInce thEy consumE ENeRgY TO convert thE gLUcosE into twO three-carbOn SugAr pHOsPHAteS (G3p).