Answer:
Option). glycolysis, Krebs cycle, electron transport
Explanation:
Cellular respiration can be defined as a biochemical process, which involves breakdown of complex substances, such as glucose to release energy. It is divided into three stages, glycolysis, Krebs cycle, and electron transport chain.
Glycolysis is a universal process that occurs in cells of all living organisms. During glycolysis, one glucose molecule breaks down to produce two pyruvate, two NADH, and ATP molecules.
Krebs cycle forms two ATP molecules, six NADH molecules, and two FADH2 molecules by oxidation of acetyl-CoA, derived from pyruvate.
Electron transport chain involves transfer of electrons and generation of a proton gradient across the membrane. It provides energy for the formation of ATP molecules, which are known as energy currency of the cells.
Thus, the correct answer is second option.
