Table sugar is

Options

A. A disaccharide consisting of D-glucose and D-fructose
B. a monosaccharide
C. a disaccharide of D-glucose
D. D - glucose

Answer

To determine what table sugar is, we need to analyze the options provided and understand the composition of table sugar.

### Step-by-step Solution:

1. **Identify Table Sugar**:
- Table sugar is commonly known as sucrose.

2. **Composition of Sucrose**:
- Sucrose is composed of two simple sugars: D-glucose and D-fructose.

3. **Understanding Disaccharides**:
- A disaccharide is formed when two monosaccharides (simple sugars) are joined together by a glycosidic bond.
- In the case of sucrose, D-glucose and D-fructose are linked together.

4. **Chemical Structure**:
- The chemical structure of sucrose shows the linkage between D-glucose and D-fructose. This linkage is formed by the combination of the hydroxyl group (OH) of one sugar and the hydrogen (H) of the other, resulting in the release of a water molecule (dehydration synthesis).

5. **Conclusion**:
- Therefore, table sugar (sucrose) is a disaccharide made up of D-glucose and D-fructose.

### Final Answer:
Table sugar is a disaccharide which has D-glucose and D-fructose.

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