Peptide bond is formed between two amino acids through

Options

A. Addition of water
B. Loss of water
C. Decarboxylation
D. Deamination.

Answer

To answer the question about how a peptide bond is formed between two amino acids, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Amino Acids**:
- Amino acids are the building blocks of proteins. Each amino acid has a central carbon atom, an amino group (-NH2), a carboxyl group (-COOH), a hydrogen atom, and a variable R group (side chain).

2. **Identifying the Groups Involved**:
- The peptide bond is formed specifically between the carboxyl group of one amino acid and the amino group of another amino acid.

3. **The Process of Peptide Bond Formation**:
- When two amino acids come together, the carboxyl group of the first amino acid reacts with the amino group of the second amino acid.
- This reaction is a type of condensation reaction (also known as a dehydration synthesis) because it involves the removal of a water molecule.

4. **Release of Water**:
- During the formation of the peptide bond, a molecule of water (H2O) is released. This is a key characteristic of the reaction, as it indicates that the bond is formed through the loss of water.

5. **Conclusion**:
- Therefore, the peptide bond is formed between two amino acids through the **loss of water**.

### Final Answer:
The peptide bond is formed between two amino acids through the **loss of water**.

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