What did S.L. Miller observe in his experimental set-up?

Options

A. Formation of sugars and nitrogenous bases
B. Formation of amino acids
C. Formation of pigments
D. Formation of fats.

Answer

**Step-by-Step Solution:**

1. **Identify the Experiment**: The experiment in question is the Miller-Urey experiment, conducted by S.L. Miller in 1953.

2. **Understand the Purpose**: The aim of the experiment was to simulate the conditions of the early Earth and to investigate the origin of organic compounds.

3. **Experimental Setup**: Miller used a mixture of gases that were believed to be present in the early Earth's atmosphere, including methane (CH₄), ammonia (NH₃), hydrogen (H₂), and water vapor (H₂O).

4. **Chemical Reactions**: The gases were subjected to electrical sparks to simulate lightning, which provided energy for chemical reactions to occur.

5. **Observation**: After conducting the experiment, Miller observed the formation of amino acids, which are the building blocks of proteins and essential for life.

6. **Conclusion**: The results of the experiment suggested that organic compounds, such as amino acids, could form from inorganic precursors under conditions thought to resemble those of the early Earth, supporting the idea that life could have originated from simple chemical processes.

**Final Answer**: S.L. Miller observed the formation of amino acids in his experimental setup.

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