What is active glucose

Options

A. FAD–glucose
B. NAD–glucose
C. Phosphoglucose
D. Glycerophosphate

Explanation

**Step-by-Step Solution:**

1. **Understanding Active Glucose**: Active glucose refers to a form of glucose that is involved in metabolic processes. It is not just the simple sugar glucose but a modified form that can participate in various biochemical reactions.

2. **Identifying the Correct Form**: Among the options provided (FAD glucose, NAD glucose, phosphoglucose, and glycerophosphate), we need to identify which one represents active glucose.

3. **Recognizing Phosphoglucose**: The term "active glucose" is specifically associated with phosphoglucose, which is also known as glucose 6-phosphate. This compound is formed when glucose is phosphorylated, making it more reactive and ready for metabolic pathways.

4. **Interconversion Process**: Active glucose (glucose 6-phosphate) can undergo interconversion with another sugar, D-fructose 6-phosphate. This process is facilitated by the enzyme glucose 6-phosphate isomerase, which allows the conversion between these two forms.

5. **Conclusion**: Based on the above points, the correct answer to the question "What is active glucose?" is phosphoglucose, or glucose 6-phosphate.

**Final Answer**: The correct option is C: Phosphoglucose (glucose 6-phosphate).

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