Name one reducing and one nonreducing disaccharide.

Explanation

To answer the question about disaccharides, we need to identify one reducing and one non-reducing disaccharide. Here's a step-by-step solution:

### Step 1: Understand Disaccharides
Disaccharides are carbohydrates composed of two monosaccharide units linked by a glycosidic bond. They can be classified based on their ability to act as reducing agents.

### Step 2: Identify Reducing Disaccharides
A reducing disaccharide contains a free aldehyde or ketone group, which allows it to act as a reducing agent. Common examples include:
- **Lactose**: Composed of glucose and galactose.
...