For what primary purpose does a cell use the energy released from redox reactions during cellular respiration?

• A. To produce glucose from carbon dioxide and water
• B. To directly power muscle contraction
• C. To synthesize ATP from ADP and inorganic phosphate
• D. To store oxygen in the mitochondria

Answer: (C)

Verified step by step guidance

1. Understand the concept of cellular respiration: Cellular respiration is a metabolic process where cells convert biochemical energy from nutrients into ATP (adenosine triphosphate), the primary energy currency of the cell.
2. Learn about redox reactions: Redox reactions involve the transfer of electrons. During cellular respiration, electrons are transferred from molecules like glucose to electron carriers, releasing energy in the process.
3. Recognize the role of ATP synthesis: The energy released from redox reactions is used to drive the synthesis of ATP from ADP (adenosine diphosphate) and inorganic phosphate (Pi). This occurs primarily in the mitochondria during oxidative phosphorylation.
4. Understand why ATP is important: ATP serves as the main energy source for various cellular processes, including muscle contraction, active transport, and biosynthesis. It is not used to directly store oxygen or produce glucose during cellular respiration.
5. Clarify the correct answer: The primary purpose of the energy released during redox reactions in cellular respiration is to synthesize ATP from ADP and inorganic phosphate, enabling the cell to perform essential functions.