Glucose is not

Options

A. dextrose
B. Grape sugar
C. Aldohexosc
D. Ketohexose

Answer

To solve the question "Glucose is not," we need to analyze the options provided and determine which one does not correctly describe glucose. Here's a step-by-step breakdown:

### Step 1: Understand the Structure of Glucose
- Glucose is a simple sugar (monosaccharide) with the molecular formula C6H12O6.
- It has an aldehyde group (-CHO) and six carbon atoms, making it an aldohexose.

### Step 2: Analyze the Options
1. **Dextrose**:
- Dextrose is another name for glucose. It refers to sugars that are dextrorotatory, meaning they rotate plane-polarized light clockwise. Since glucose is indeed dextrorotatory, this option is incorrect.

2. **Grape Sugar**:
- Glucose is commonly known as grape sugar because it is found in grapes. Therefore, this option is also incorrect.

3. **Aldohexose**:
- Aldohexose refers to a sugar that contains an aldehyde group and has six carbon atoms. Since glucose fits this definition (it has an aldehyde group and six carbons), this option is also incorrect.

4. **Ketohexose**:
- Ketohexose refers to a sugar that has a ketone group and six carbon atoms. Glucose does not have a ketone group; it has an aldehyde group. Therefore, this option is correct as glucose is not a ketohexose.

### Conclusion
- The correct answer to the question "Glucose is not" is **Ketohexose**.

### Final Answer
Glucose is not a ketohexose.

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