Select the wrongly matched pair wrt the intermediates of krebs cycle

Options

A. citric acid
B. Succinyl CoA
C. alpha'-ketoglutaric acid
D. pyruvic acid

Answer

To solve the question regarding the wrongly matched pair with respect to the intermediates of the Krebs cycle, we will follow these steps:

### Step 1: Understand the Krebs Cycle
The Krebs cycle, also known as the citric acid cycle or tricarboxylic acid (TCA) cycle, is a series of chemical reactions used by all aerobic organisms to generate energy. The cycle starts with the condensation of acetyl CoA and oxaloacetic acid to form citric acid.

### Step 2: Identify the Key Intermediates
The key intermediates of the Krebs cycle include:
- Citric acid (6 carbon compound)
- Alpha-ketoglutaric acid (5 carbon compound)
- Succinyl CoA (4 carbon compound)
- Succinic acid (4 carbon compound)
- Fumaric acid (4 carbon compound)
- Malic acid (4 carbon compound)
- Oxaloacetic acid (4 carbon compound)

### Step 3: Analyze the Options
The question asks for the wrongly matched pair. We need to identify if any of the options provided include a compound that is not an intermediate of the Krebs cycle.

### Step 4: Recognize Pyruvic Acid's Role
Pyruvic acid is not an intermediate of the Krebs cycle; rather, it is the end product of glycolysis. Pyruvic acid is converted into acetyl CoA before entering the Krebs cycle. Therefore, it does not appear as an intermediate in the cycle itself.

### Step 5: Conclusion
Based on the analysis, the wrongly matched pair is the one that includes pyruvic acid, as it is not an intermediate of the Krebs cycle but rather a precursor that is converted to acetyl CoA.

### Final Answer
The wrongly matched pair with respect to the intermediates of the Krebs cycle is **pyruvic acid**.

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