It is the most energy rich compound:

Correct answer: B. ATP

  • A. FADH2
  • B. ATP
  • C. NADH
  • D. GTP

Explanation

ATP is indeed the most energy-rich compound in cellular metabolism. ATP (adenosine triphosphate) is the cell's primary energy currency. It stores and transfers energy for various cellular processes. The energy stored in ATP is primarily in the form of the high-energy phosphate bonds between its three phosphate groups. When ATP is hydrolyzed by the enzyme ATPase, it undergoes a reaction in which one of the phosphate groups is cleaved, forming adenosine diphosphate (ADP) and inorganic phosphate (Pi). This hydrolysis reaction releases a significant amount of energy that can be utilized by cells to perform work. The energy released from the hydrolysis of ATP powers a wide range of cellular processes, including muscle contraction, active transport of molecules across membranes, synthesis of macromolecules, nerve signal transmission, and many other energy-requiring reactions in cells.

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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.

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