One of the following is a neutral amino acid
(a) Arginine
(b) Glycine
(c) Glutamic acid
(d) Aspartic acid

Options

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

Answer

To determine which of the following amino acids is a neutral amino acid, we need to categorize each option based on their properties:

1. **Understanding Amino Acids**: Amino acids can be classified into three main categories: acidic, basic, and neutral.
- **Acidic Amino Acids**: These amino acids have more carboxyl groups (-COOH) than amino groups (-NH2). Examples include glutamic acid and aspartic acid.
- **Basic Amino Acids**: These amino acids have more amino groups than carboxyl groups. An example is arginine.
- **Neutral Amino Acids**: These amino acids have an equal number of amino and carboxyl groups.

2. **Analyzing the Options**:
- **Option A: Arginine** - This is a basic amino acid because it has a side chain with an additional amino group.
- **Option B: Glycine** - This is a neutral amino acid. It has one amino group and one carboxyl group, making it neutral.
- **Option C: Glutamic Acid** - This is an acidic amino acid due to the presence of an extra carboxyl group.
- **Option D: Aspartic Acid** - This is also an acidic amino acid, similar to glutamic acid.

3. **Conclusion**: Based on the classification, the only neutral amino acid among the options provided is glycine.

**Final Answer**: (b) Glycine

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