Which of the following correctly states the relationship between anabolic and catabolic pathways?

• A. Degradation of organic molecules by anabolic pathways provides the energy to drive catabolic pathways.
• B. Energy derived from catabolic pathways is used to drive the breakdown of organic molecules in anabolic pathways.
• C. Catabolic pathways produce usable cellular energy by synthesizing more complex organic molecules.
• D. The flow of energy between catabolic and anabolic pathways is reversible.
• E. Anabolic pathways synthesize more complex organic molecules using the energy derived from catabolic pathways.

Answer: (E)

Verified step by step guidance

1. Understand the definitions: Anabolic pathways are processes that build complex molecules from simpler ones, requiring energy. Catabolic pathways break down complex molecules into simpler ones, releasing energy.
2. Identify the energy flow: In biological systems, energy released from catabolic pathways is often used to power anabolic pathways. This is because the breakdown of molecules releases energy that can be harnessed for biosynthesis.
3. Analyze the options: The correct relationship should reflect that catabolic pathways provide energy for anabolic pathways, not the other way around.
4. Evaluate the given statements: The correct statement should indicate that anabolic pathways use the energy derived from catabolic pathways to synthesize complex molecules.
5. Select the correct statement: Based on the analysis, the correct relationship is that anabolic pathways synthesize more complex organic molecules using the energy derived from catabolic pathways.