EVERYDAY SCIENCE

Detailed explanation-1: -ATP production is carried out in the degradation of the complex molecules by the cell. The cycle is operated primarily in the cell for the production of ATP in glycolysis. The ATP is produced in the glycolysis cycle with the breakdown of glucose molecules. Thus, option D is correct.

Detailed explanation-2: -Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.

Detailed explanation-3: -The phosphate tail of ATP is the actual power source which the cell taps. Available energy is contained in the bonds between the phosphates and is released when they are broken, which occurs through the addition of a water molecule (a process called hydrolysis).

Detailed explanation-4: -If a cell needs to spend energy to accomplish a task, the ATP molecule splits off one of its three phosphates, becoming ADP (Adenosine di-phosphate) + phosphate. The energy holding that phosphate molecule is now released and available to do work for the cell.

Detailed explanation-5: -Answer and Explanation: Energy is released when an ATP is broken down into ADP and phosphate (a is correct). ATP is the primary energy currency of the cell. This means that cellular processes that require an energy input rely on the energy released from ATP hydrolysis.