The first organic compound to be formed in Miller's experiment was

Options

A. Alanine
B. Glycine
C. Aspartic acid
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Experiment**: The experiment conducted by S. L. Miller aimed to simulate the conditions of early Earth to test the hypothesis of chemical evolution proposed by Oparin and Haldane.

2. **Experimental Setup**: Miller used a sealed apparatus where he combined water, methane, ammonia, and hydrogen. He applied an electric spark (75,000 volts) to mimic lightning, which is believed to have been common in the early atmosphere.

3. **Duration of the Experiment**: The experiment ran for 18 days, during which the conditions allowed for chemical reactions to occur.

4. **Results of the Experiment**: After 18 days, Miller analyzed the products formed in the apparatus. The results showed that amino acids were produced.

5. **Identifying the Amino Acids**: The specific amino acids identified in Miller's experiment included alanine, glycine, and aspartic acid.

6. **Conclusion**: Since all three amino acids were formed during the experiment, the first organic compound to be formed can be considered as all of these amino acids.

**Final Answer**: The first organic compound to be formed in Miller's experiment was **all of these** (alanine, glycine, and aspartic acid).

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