Which of the following type of reaction occurs during the formation of peptide bond and glycosidic bond ?

Options

A. dehydrogenation
B. decarboxylation
C. dehydration
D. oxidation

Answer

To determine the type of reaction that occurs during the formation of peptide bonds and glycosidic bonds, we can analyze the processes involved in each type of bond formation.

### Step-by-Step Solution:

1. **Understanding Peptide Bond Formation**:
- A peptide bond forms between two amino acids. Each amino acid consists of an amino group (-NH2), a carboxyl group (-COOH), and a side chain (R group).
- When two amino acids join, the carboxyl group of one amino acid reacts with the amino group of the other.
- During this reaction, the hydroxyl group (OH) from the carboxyl group of the first amino acid and a hydrogen atom (H) from the amino group of the second amino acid are removed, resulting in the release of a water molecule (H2O).
- The remaining parts of the amino acids then form a covalent bond, known as a peptide bond.

2. **Understanding Glycosidic Bond Formation**:
- A glycosidic bond forms between two monosaccharides (sugar molecules).
- Similar to peptide bonds, when two monosaccharides link together, a hydroxyl group (OH) from one sugar and a hydrogen atom (H) from another sugar are removed.
- This also results in the release of a water molecule (H2O).
- The remaining parts of the sugar molecules then form a covalent bond, known as a glycosidic bond.

3. **Identifying the Type of Reaction**:
- Both the peptide bond and glycosidic bond formations involve the removal of a water molecule.
- This type of reaction is referred to as a **dehydration reaction** (or condensation reaction), where water is removed to form a new bond.

4. **Conclusion**:
- The correct answer to the question is that both peptide bond and glycosidic bond formations occur via **dehydration reactions**.

### Final Answer:
The type of reaction that occurs during the formation of peptide bonds and glycosidic bonds is **dehydration**.

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