Stanley miller observed the formation of ______ during the experiment.

Options

A. Nuclei Acid
B. Nucleotides
C. Amino acid
D. Polypeptide

Answer

**Step-by-Step Solution:**

1. **Understanding the Experiment**: Stanley Miller conducted an experiment to explore the chemical origins of life. He aimed to simulate the conditions of the early Earth to see if organic compounds could be formed from inorganic precursors.

2. **Setup of the Experiment**: In his experiment, Miller created a closed system that 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).

3. **Simulating Lightning**: To mimic the energy sources that could drive chemical reactions on early Earth, Miller introduced electric discharges (simulating lightning) into the system using electrodes.

4. **Temperature Conditions**: The experiment was conducted at a high temperature of around 800 degrees Celsius, which facilitated the reactions between the gases.

5. **Analyzing the Products**: After running the experiment for a period, Miller analyzed the products formed in the system. He discovered that various organic compounds had been synthesized.

6. **Identifying the Key Product**: Among the organic compounds formed, the most notable were amino acids, which are the building blocks of proteins. Other options like nucleic acids, nucleotides, and polypeptides were not produced in significant amounts during the experiment.

7. **Conclusion**: Therefore, the correct answer to the question is that Stanley Miller observed the formation of **amino acids** during his experiment.

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