Why is ATP an important product of cellular respiration?

• A. ATP serves as a genetic material in cells.
• B. ATP is used to transport oxygen in the bloodstream.
• C. ATP acts as a structural component of cell membranes.
• D. ATP stores and provides energy for cellular processes.

Answer: (D)

Verified step by step guidance

1. Understand the role of ATP in cellular respiration: ATP (adenosine triphosphate) is the primary energy carrier in cells. It captures chemical energy obtained from the breakdown of food molecules and releases it to fuel other cellular processes.
2. Recognize that ATP is not involved in genetic material, oxygen transport, or as a structural component: ATP does not serve as genetic material (that role is fulfilled by DNA and RNA), it is not used to transport oxygen (that is the role of hemoglobin in red blood cells), and it is not a structural component of cell membranes (which are primarily composed of lipids and proteins).
3. Identify the correct function of ATP: ATP stores energy in its high-energy phosphate bonds. When a cell needs energy, it breaks these bonds through hydrolysis, releasing energy for cellular activities.
4. Consider the processes that require ATP: Many cellular processes, such as muscle contraction, nerve impulse propagation, and chemical synthesis, require energy in the form of ATP.
5. Conclude that ATP is crucial for energy transfer: The primary importance of ATP in cellular respiration is its role in storing and providing energy for various cellular processes, making it essential for maintaining cellular function and life.