AP BIOLOGY

Detailed explanation-1: -The correct option is B False. Respiration: Respiration is a chemical reaction that occurs within the cell. The air we breathe carries oxygen to our lungs and then to our cells, where it aids in the breakdown of glucose (C6H12O6), resulting in the production of energy.

Detailed explanation-2: -ATP is generated during the process. Though this equation may not seem that complicated, cellular respiration is a series of chemical reactions divided into three stages: glycolysis, the Krebs cycle, and the electron transport chain.

Detailed explanation-3: -There are four stages: glycolysis, the link reaction, the Krebs cycle and oxidative phosphorylation. During glycolysis, glucose molecules (six-carbon molecules) are split into two pyruvates (three-carbon molecules) during a sequence of enzyme-controlled reactions. This occurs in both aerobic and anaerobic respiration.

Detailed explanation-4: -Cellular respiration involves the oxidation of food in many steps where the chemical energy is transformed into ATP molecules, with some energy being released as heat with each step that increases the entropy of the system. Thus, respiration takes place following the laws of thermodynamics.

Detailed explanation-5: -The first stage of cellular respiration is glycolysis. This process is shown in the top box in Figure 5.9. 3 showing a 6-carbon molecule being broken down into two 3-carbon pyruvate molecules. ATP is produced in this process which takes place in the cytosol of the cytoplasm.