Conversion of `alpha`- ketoglutaric acid into succinyl co-A is a step of

Options

A. EMP pathway
B. TCA cycle
C. HMP pathway
D. ED pathway

Answer

To solve the question regarding the conversion of alpha-ketoglutaric acid into succinyl coenzyme A, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Reaction**: The question asks about the conversion of alpha-ketoglutaric acid into succinyl coenzyme A. This is a specific biochemical reaction that occurs in cellular respiration.

2. **Understand the Context**: This conversion is part of a larger metabolic pathway. In plants and other organisms, alpha-ketoglutaric acid is an intermediate in the Krebs cycle (also known as the citric acid cycle or TCA cycle).

3. **Recognize the Process**: The conversion of alpha-ketoglutaric acid to succinyl coenzyme A involves an oxidative decarboxylation reaction. In this process, alpha-ketoglutaric acid loses a carbon atom in the form of carbon dioxide (CO2), and it is converted into succinyl coenzyme A.

4. **Identify the Cycle**: Since this reaction is part of the Krebs cycle, we can conclude that it is specifically a step in this cycle. The Krebs cycle is crucial for energy production in aerobic respiration.

5. **Final Answer**: Therefore, the conversion of alpha-ketoglutaric acid into succinyl coenzyme A is a step of the **Krebs cycle (TCA cycle)**.