In a deoxyribonucleoside triphosphates, how many high energy phosphate bonds are present ?

Options

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

Explanation

To determine how many high energy phosphate bonds are present in a deoxyribonucleoside triphosphate (dNTP), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of dNTP**:
- A deoxyribonucleoside triphosphate consists of three components: a deoxyribose sugar, a nitrogenous base (adenine, guanine, cytosine, or thymine), and three phosphate groups.

2. **Identify the Phosphate Groups**:
- The three phosphate groups in a dNTP are typically labeled as α (alpha), β (beta), and γ (gamma). They are connected in a chain.

3. **Recognize High Energy Bonds**:
- The bonds between the phosphate groups are known as high energy phosphate bonds. Specifically, the bonds between the β and γ phosphates, and between the α and β phosphates, are considered high energy bonds.

4. **Count the High Energy Bonds**:
- In a dNTP, there are two high energy phosphate bonds:
- One bond between the α and β phosphate groups.
- One bond between the β and γ phosphate groups.

5. **Conclusion**:
- Therefore, the total number of high energy phosphate bonds present in a deoxyribonucleoside triphosphate is **2**.

### Final Answer:
The number of high energy phosphate bonds in a deoxyribonucleoside triphosphate is **2**.

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