What did Miller obtain from his experiment simulating conditions of early earth?

Options

A. Amino acids
B. Organic acids
C. Peptides
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding the Experiment**: The Miller-Urey experiment was designed to simulate the conditions of early Earth to explore the origins of life. The researchers aimed to recreate the primitive atmosphere and test if organic compounds could form under those conditions.

2. **Conditions Used**: In their experiment, Miller and Urey used a mixture of gases that were believed to be present in the early Earth's atmosphere, including water vapor, methane (CH₄), ammonia (NH₃), and hydrogen (H₂). These gases were placed in a sealed flask to create a controlled environment.

3. **Application of Energy**: To simulate lightning, which was thought to be a source of energy on early Earth, the experimenters applied a strong electric field to the gas mixture. This electric discharge created sparks, providing the energy necessary for chemical reactions to occur.

4. **Results of the Experiment**: After running the experiment for a period of time, Miller and Urey analyzed the contents of the flask. They discovered that several organic compounds had formed as a result of the reactions initiated by the electric sparks.

5. **Specific Compounds Obtained**: The most significant finding was the formation of five different amino acids. These amino acids included:
- Glycine
- Alanine
- Alpha-alanine
- Beta-alanine
- Aspartic acid
- Aminobutyric acid

6. **Conclusion**: The primary outcome of Miller's experiment was the production of amino acids. While peptides and other organic acids can be formed from amino acids, the direct products of the experiment were the amino acids themselves.

### Final Answer:
Miller obtained amino acids from his experiment simulating conditions of early Earth.

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