Glucose and galactose unite to form

Options

A. Maltose
B. Sucrose
C. Isomaltose
D. Lactose

Answer

To solve the question "Glucose and galactose unite to form," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Monosaccharides**: Recognize that glucose and galactose are both monosaccharides, which are the simplest form of carbohydrates.

2. **Understand Disaccharides**: A disaccharide is formed when two monosaccharides join together through a glycosidic bond.

3. **Consider the Combinations**: We need to determine which disaccharide is formed when glucose and galactose unite.

4. **Evaluate the Options**:
- **Option A: Maltose** - This is formed from two glucose molecules, so it is not the correct answer.
- **Option B: Sucrose** - This is formed from glucose and fructose, so it is also not the correct answer.
- **Option C: Isomaltose** - This is similar to maltose and is also formed from two glucose molecules, thus not the correct answer.
- **Option D: Lactose** - This is formed from glucose and galactose, making it the correct answer.

5. **Conclusion**: The correct answer is lactose, which is the disaccharide formed by the combination of glucose and galactose.

### Final Answer:
Glucose and galactose unite to form **lactose**.

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