In the presence of of TPP and decarboxylase enzyme, pyruvic acid is converted into

Options

A. Citric acid and `CO_(2)`
B. Acetaldehyde and `CO_(2)`
C. Ehtyl alcohol and `CO_(2)`
D. Acetic acid and `CO_(2)`

Answer

To solve the question, "In the presence of TPP and decarboxylase enzyme, pyruvic acid is converted into," we need to analyze the biochemical pathway involving pyruvic acid and the specific enzymes mentioned.

### Step-by-Step Solution:

1. **Identify the Substrate**: The substrate in question is pyruvic acid, which is a key intermediate in several metabolic pathways, including glycolysis and the Krebs cycle.

2. **Recognize the Enzyme and Cofactor**: The enzyme mentioned is a decarboxylase, specifically pyruvate decarboxylase. The cofactor required for this reaction is thiamine pyrophosphate (TPP).

3. **Understand the Reaction**: The role of pyruvate decarboxylase is to catalyze the decarboxylation of pyruvic acid. This means that it will remove a carboxyl group (CO2) from pyruvic acid.

4. **Determine the Product**: Upon decarboxylation, pyruvic acid is converted into acetaldehyde (CH3CHO) and carbon dioxide (CO2). This reaction is part of the fermentation process.

5. **Evaluate the Options**:
- **Citric acid and carbon dioxide**: Incorrect, as citric acid is not formed directly from pyruvic acid.
- **Acetaldehyde and carbon dioxide**: Correct, as this is the direct product of the reaction.
- **Ethyl alcohol and carbon dioxide**: Incorrect, as ethyl alcohol is formed from acetaldehyde, not directly from pyruvic acid.
- **Acetic acid and carbon dioxide**: Incorrect, as acetic acid is not formed directly from pyruvic acid.

6. **Conclusion**: The correct answer is that pyruvic acid is converted into acetaldehyde and carbon dioxide in the presence of TPP and the decarboxylase enzyme.

### Final Answer:
**Acetaldehyde and carbon dioxide.**