Statement-I: Glycolysis is the first step of respiration in which glucose completely breaks into CO 2 and H 2 O Statement-II: In this process, there is a net gain of twenty-four molecules of ATP.

Step-by-step solution

Glycolysis / EMP pathway: Discovery: It is given by Embden, Meyerhoff, and Parnas in 1930. It is the first stage of the breakdown of glucose in the cell. Definition: Glycolysis (Gr. glykys= sweet, sugar; lysis= breaking) is a stepped process by which one molecule of glucose (6C) breaks into two molecules of pyruvic acid (3C). Site of occurrence: Glycolysis takes place in the cytosol and does not utilize oxygen. Thus, it is an anaerobic pathway. In fact, it occurs in both aerobic and anaerobic respiration. Steps of