Removal of hydrogen and `CO_(2)` from a substrate is called

Options

A. Decarboxylation
B. Oxidation
C. Oxidative decarboxylation
D. Reductive decarboxylation.

Answer

To solve the question regarding the removal of hydrogen and carbon dioxide from a substrate, we will analyze the options provided and determine which one fits the description.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- We need to identify what each term means in the context of biochemical reactions.

2. **Decarboxylation**:
- This process involves the removal of a carboxyl group (–COOH) from a substrate, which results in the release of carbon dioxide (CO₂).
- Since the question specifically mentions the removal of hydrogen and carbon dioxide, this option does not fit.
- **Conclusion**: Decarboxylation is not the correct answer.

3. **Oxidation**:
- Oxidation refers to the removal of hydrogen from a substrate.
- However, it does not involve the removal of carbon dioxide.
- **Conclusion**: Oxidation is not the correct answer.

4. **Oxidative Decarboxylation**:
- This reaction involves both the removal of hydrogen and the removal of a carboxyl group, leading to the release of carbon dioxide.
- Since this option matches the requirement of removing both hydrogen and carbon dioxide, it is a strong candidate for the correct answer.
- **Conclusion**: Oxidative decarboxylation is likely the correct answer.

5. **Reductive Decarboxylation**:
- In this reaction, there is an addition of hydrogen (reduction) along with the removal of a carboxyl group.
- This contradicts the question's requirement of removing hydrogen.
- **Conclusion**: Reductive decarboxylation is not the correct answer.

6. **Final Answer**:
- Based on the analysis, the correct answer to the question is **Oxidative Decarboxylation**.