Respiratory pathway is

Options

A. catabolic
B. amphibolic
C. anabolic
D. endergonic

Explanation

**Step-by-Step Solution:**

1. **Understanding the Respiratory Pathway**: The respiratory pathway in plants refers to the series of biochemical processes that convert glucose and other substrates into energy. This involves both breaking down complex molecules (catabolism) and building up simpler molecules into complex ones (anabolism).

2. **Identifying the Types of Metabolic Pathways**:
- **Catabolic Pathway**: This involves the breakdown of complex molecules into simpler ones, releasing energy in the process. For example, carbohydrates are broken down into glucose, fats into fatty acids, and proteins into amino acids.
- **Anabolic Pathway**: This involves the synthesis of complex molecules from simpler ones, which requires energy. For instance, amino acids are used to synthesize proteins.

3. **Conclusion on the Nature of the Respiratory Pathway**: Since the respiratory pathway includes both catabolic and anabolic processes, it is classified as an **amphibolic pathway**. This means it can function in both breaking down molecules to release energy and building up molecules for growth and repair.

4. **Final Answer**: The correct answer to the question "Respiratory pathway is" is **amphibolic** (second option).

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