AP BIOLOGY

Detailed explanation-1: -In organisms that perform cellular respiration, glycolysis is the first stage of this process. However, glycolysis doesn’t require oxygen, and many anaerobic organisms-organisms that do not use oxygen-also have this pathway.

Detailed explanation-2: -Stages of Cellular Respiration The reactions of cellular respiration can be grouped into three stages: glycolysis (stage 1), the Krebs cycle, also called the citric acid cycle (stage 2), and electron transport (stage 3).

Detailed explanation-3: -The second stage of cellular respiration, the Krebs cycle, takes place in the matrix. The third stage, electron transport, takes place on the inner membrane.

Detailed explanation-4: -There are three main steps of cellular respiration: glycolysis; the citric acid (TCA) or the Krebs cycle; and the electron transport chain, where oxidative phosphorylation occurs.

Detailed explanation-5: -There are two phases of Glycolysis: the “priming phase” because it requires an input of energy in the form of 2 ATPs per glucose molecule and. the “pay off phase” because energy is released in the form of 4 ATPs, 2 per glyceraldehyde molecule.