One molecule of glucose and one molecule of galactose form:

Options

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

Answer

To solve the question "One molecule of glucose and one molecule of galactose form:", we will analyze the components and their combinations step by step.

### Step-by-Step Solution:

1. **Identify the Molecules**:
- We have two monosaccharides: glucose and galactose.
- Both of these are simple sugars (monosaccharides) that can combine to form a disaccharide.

**Hint**: Remember that monosaccharides are the building blocks of carbohydrates.

2. **Understand Disaccharide Formation**:
- When two monosaccharides combine, they form a disaccharide through a condensation reaction (also known as dehydration synthesis), where a water molecule is released.

**Hint**: Look for the reaction type that involves the removal of water to form a bond.

3. **Identify the Disaccharide**:
- The specific disaccharide formed from one molecule of glucose and one molecule of galactose is lactose.
- Lactose is commonly known as milk sugar and is found in milk and dairy products.

**Hint**: Recall that lactose is specifically made from glucose and galactose, unlike other disaccharides.

4. **Eliminate Incorrect Options**:
- Maltose is formed from two glucose molecules.
- Sucrose is formed from glucose and fructose.
- Aniline is not a carbohydrate but an organic compound.

**Hint**: Compare the structures of the disaccharides to confirm which ones are made from the correct monosaccharides.

### Final Answer:
One molecule of glucose and one molecule of galactose form **lactose**.