Which one of the following amino-acids was not found to be synthesized in Miller's experiment

Options

A. Glycine
B. Aspartic acid
C. Glutamic acid
D. Alanine.

Answer

To solve the question of which amino acid was not synthesized in Miller's experiment, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Miller-Urey Experiment**: The Miller-Urey experiment, conducted by Stanley Miller and Harold Urey in 1953, aimed to simulate the conditions of early Earth to test the hypothesis of abiogenesis, the origin of life from non-living matter.

2. **Identify the Amino Acids Studied**: The experiment involved the synthesis of various organic compounds, including amino acids. The amino acids that were specifically noted to be synthesized during this experiment include glycine, aspartic acid, and alanine.

3. **List the Options Provided**: The question provides four amino acids: glycine, aspartic acid, glutamic acid, and alanine.

4. **Cross-Reference with Experiment Findings**:
- Glycine: Found in the experiment.
- Aspartic Acid: Found in the experiment.
- Alanine: Found in the experiment.
- Glutamic Acid: Not found in the experiment.

5. **Conclusion**: Based on the findings from the Miller-Urey experiment, the amino acid that was not synthesized is glutamic acid.

### Final Answer:
**Glutamic Acid** was not found to be synthesized in Miller's experiment.

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