Which is formed through phosphorylation in glycolysis?

Options

A. Fructose 1-6 Biphosphate
B. DHA-3- phosphate
C. Both are correct
D. Glyceraldehyde-3-phosphate

Explanation

**Step-by-Step Solution:**

1. **Understanding Phosphorylation:**
- Phosphorylation is the process of adding a phosphate group (PO4) to a molecule. In glycolysis, this occurs at several steps and is crucial for the conversion of glucose into usable energy.

2. **Identifying the Key Steps in Glycolysis:**
- Glycolysis involves several steps, starting with glucose and ending with pyruvate. The key steps related to phosphorylation include the conversion of glucose to glucose-6-phosphate and fructose-6-phosphate to fructose-1,6-bisphosphate.

3. **First Phosphorylation Step:**
- The first step involves the conversion of glucose to glucose-6-phosphate. This reaction is catalyzed by the enzyme hexokinase, and it uses one ATP molecule, which donates a phosphate group to glucose.

4. **Isomerization Step:**
- The glucose-6-phosphate is then converted to fructose-6-phosphate through isomerization. This step does not involve phosphorylation.

5. **Second Phosphorylation Step:**
- The fructose-6-phosphate is then phosphorylated to form fructose-1,6-bisphosphate. This reaction is catalyzed by the enzyme phosphofructokinase, which transfers another phosphate group from ATP to fructose-6-phosphate.

6. **Conclusion:**
- The compound that is formed through phosphorylation in glycolysis is fructose-1,6-bisphosphate. Therefore, the correct answer to the question is fructose-1,6-bisphosphate.

**Final Answer:**
Fructose-1,6-bisphosphate is formed through phosphorylation in glycolysis.

---