When all the peptide bonds of a protein have been broken down . The result would be

Options

A. Amide
B. Oligosaccharide
C. Polypeptide
D. Amino acid

Answer

**Step-by-Step Solution:**

1. **Understanding Peptide Bonds**: Peptide bonds are covalent bonds that link amino acids together to form proteins. Each bond connects the carboxyl group of one amino acid to the amino group of another.

2. **Nature of Proteins**: Proteins are macromolecules made up of long chains of amino acids. These chains are formed by the linkage of amino acids through peptide bonds.

3. **Breaking Down Proteins**: When all the peptide bonds in a protein are broken, the process is known as hydrolysis. This process involves the addition of water to break the bonds.

4. **Result of Peptide Bond Cleavage**: The cleavage of peptide bonds results in the release of individual amino acids. This is because the protein, which is a polypeptide chain, is essentially a sequence of amino acids linked together.

5. **Relation to Digestion**: This process of breaking down proteins into amino acids occurs during digestion, where dietary proteins are hydrolyzed in the stomach and small intestine.

6. **Final Conclusion**: Therefore, when all the peptide bonds of a protein have been broken down, the result would be free amino acids.

**Final Answer**: When all the peptide bonds of a protein have been broken down, the result would be amino acids.

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