During glycolysis the number of ATP molecules utilised to change glucose into fructose 1, 6 diphosphate are

Options

A. 4
B. 3
C. 2
D. 1

Answer

To solve the question regarding the number of ATP molecules utilized during the conversion of glucose into fructose 1,6-diphosphate in glycolysis, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Glycolysis**: Glycolysis is the metabolic pathway that converts glucose into pyruvate, generating small amounts of ATP and NADH in the process. It occurs in the cytoplasm of the cell.

2. **Initial Steps of Glycolysis**: The first phase of glycolysis is known as the energy investment phase. During this phase, glucose is phosphorylated and converted into fructose 1,6-diphosphate.

3. **ATP Utilization**: In the conversion of glucose to fructose 1,6-diphosphate, two ATP molecules are used. The process involves two key reactions:
- The first ATP is used to phosphorylate glucose to form glucose-6-phosphate.
- The second ATP is used to convert fructose-6-phosphate into fructose 1,6-diphosphate.

4. **Conclusion**: Therefore, the total number of ATP molecules utilized to convert glucose into fructose 1,6-diphosphate is **2**.

### Final Answer:
The number of ATP molecules utilized to change glucose into fructose 1,6-diphosphate during glycolysis is **2**.

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