Which of the following statements best explains why all organisms must produce ATP?

• A. ATP acts as a structural component of cell membranes.
• B. ATP stores genetic information required for cell division.
• C. ATP is the main pigment used in photosynthesis.
• D. ATP provides the immediate source of energy for cellular processes.

Answer: (D)

Verified step by step guidance

1. Understand the role of ATP (adenosine triphosphate) in cellular processes. ATP is a molecule that stores and provides energy for various biological functions, such as muscle contraction, active transport, and chemical reactions.
2. Eliminate incorrect options by analyzing their biological relevance: ATP does not act as a structural component of cell membranes, as membrane structure is primarily composed of lipids and proteins.
3. Recognize that ATP does not store genetic information. Genetic information is stored in DNA and RNA, not ATP.
4. Identify that ATP is not a pigment used in photosynthesis. Pigments like chlorophyll are responsible for capturing light energy during photosynthesis.
5. Conclude that the correct explanation is: ATP provides the immediate source of energy for cellular processes. This is because ATP hydrolysis releases energy that cells use to perform work.