In liver alcohol is converted into a more toxic substance called

Options

A. Acetaldehyde
B. Formaldehyde
C. Hydrogen cyanide
D. Methane

Answer

**Step-by-Step Solution:**

1. **Understanding Alcohol Metabolism**: Alcohol is primarily metabolized in the liver. The process involves several enzymatic reactions that convert alcohol into different substances.

2. **Initial Conversion**: The first step in alcohol metabolism is the conversion of alcohol (ethanol) into acetaldehyde. This reaction is facilitated by an enzyme called alcohol dehydrogenase.

3. **Toxicity of Acetaldehyde**: Acetaldehyde is known to be more toxic than alcohol itself. Its accumulation in the body can lead to unpleasant symptoms, often referred to as hangover symptoms.

4. **Further Breakdown**: After acetaldehyde is formed, it is further metabolized into acetate by another enzyme called aldehyde dehydrogenase. Acetate is less toxic and is eventually converted into carbon dioxide and water.

5. **Conclusion**: Since the question specifically asks for the more toxic substance that alcohol is converted into in the liver, the correct answer is acetaldehyde.

**Final Answer**: Acetaldehyde (Option 1).

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