Work Step by Step
Option a. is incorrect. Fermentation is the process of making ATP in the absence of oxygen. Option c. is incorrect. The Krebs cycle is the second step in the series of reactions that release the energy stored in glucose. Option d. is incorrect. Electron transport refers to the transfer of electrons from substances that are electron donors to substances that are electron acceptors. Option b. is correct. Glycolysis is the first step in releasing the energy in glucose. The products of glycolysis are pyruvic acid and ATP.