A- All of the living organisms utilize light energy for their metabolism
R- Positive metabolism is called catabolism

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

To solve the assertion and reason question, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
- **Assertion (A)**: "All of the living organisms utilize light energy for their metabolism."
- Metabolism refers to all the chemical reactions that occur within living organisms to maintain life. It includes both catabolic (breaking down molecules) and anabolic (building up molecules) processes.
- While plants utilize light energy through photosynthesis, animals primarily obtain energy from food. Therefore, not all living organisms utilize light energy for their metabolism.

**Conclusion for Assertion**: The assertion is incorrect.

### Step 2: Analyze the Reason
- **Reason (R)**: "Positive metabolism is called catabolism."
- Catabolism refers to the metabolic processes that break down larger molecules into smaller ones, releasing energy in the process. This is considered a form of negative metabolism because it involves the breakdown of substances.
- Anabolism, on the other hand, is the process that builds complex molecules from simpler ones and requires energy, thus it is termed positive metabolism.

**Conclusion for Reason**: The reason is also incorrect.

### Step 3: Final Conclusion
- Since both the assertion and the reason are incorrect, the correct answer to the question is that both the assertion and reason are wrong.

### Final Answer
Both assertion and reason are incorrect.

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