Which of the following was formed in S. Miller's experiment?

Options

A. Microsphere
B. Nucleic acids
C. Amino acids
D. UV radiations

Answer

**Step-by-Step Solution:**

1. **Identify the Scientist and Experiment**: The question refers to S. Miller, who is known for his experiment conducted in 1953, which is often referred to as Miller's experiment.

2. **Understand the Purpose of the Experiment**: Miller's experiment aimed to test the theory of chemical evolution, which suggests that organic compounds could form from inorganic precursors under certain conditions.

3. **Describe the Experimental Setup**: In his experiment, Miller created a closed system that simulated the conditions of early Earth. This setup included a mixture of gases believed to be present in the early atmosphere, such as methane (CH4), ammonia (NH3), hydrogen (H2), and water vapor (H2O).

4. **Introduce Electrical Discharge**: Miller introduced electrical discharge into the system to simulate lightning, which was thought to provide the energy necessary for chemical reactions to occur.

5. **Identify the Products of the Experiment**: The result of the electrical discharge in the closed flask led to the formation of several organic compounds, most notably amino acids, which are the building blocks of proteins.

6. **Conclude the Findings**: Therefore, the main outcome of S. Miller's experiment was the formation of amino acids, which supports the idea that life could have originated from simple organic molecules.

**Final Answer**: The correct answer is that amino acids were formed in S. Miller's experiment.

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