In maltose structure which 2 groups are there

Options

A. acetal,ketal
B. hemiacetal,acetal
C. hemiacetal,ketal
D. hemiacetal, hemiketal

Answer

To determine the two groups present in the structure of maltose, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Maltose**: Maltose is a disaccharide composed of two glucose units linked together. Specifically, it consists of two alpha-D-glucopyranose units.

2. **Identifying the Linkage**: The two glucose units in maltose are linked by a glycosidic bond. In maltose, this bond occurs between the first carbon (C1) of one glucose unit and the fourth carbon (C4) of the other glucose unit. This linkage is specifically an α(1→4) glycosidic bond.

3. **Drawing the Structure**: To visualize maltose, we can draw the two alpha-D-glucopyranose units. Each unit has a specific arrangement of hydroxyl (OH) groups and hydrogen (H) atoms.

- The first unit (C1) will have an OH group pointing down (since it is alpha).
- The second unit (C4) will also have an OH group pointing down, which forms the glycosidic bond with the first unit.

4. **Identifying Functional Groups**: In the structure of maltose, we can identify two main functional groups:
- **Hemiacetal Group**: This is formed at the C1 of the first glucose unit where the OH group is present along with the glycosidic bond.
- **Acetal Group**: This is formed at the C4 of the second glucose unit where the glycosidic bond connects to the first glucose unit.

5. **Conclusion**: Therefore, the two groups present in the structure of maltose are:
- Hemiacetal
- Acetal

### Final Answer:
The two groups present in the structure of maltose are the **hemiacetal** and the **acetal** groups.

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