Which is correct for ADP

Options

A. Two high energy bonds
B. One high energy bond
C. Three high energy bonds
D. None of the above

Answer

To determine the correct statement regarding ADP (adenosine diphosphate), let's analyze the structure and the types of bonds present in ADP step by step.

### Step-by-Step Solution:

1. **Understanding ADP**:
- ADP stands for adenosine diphosphate. It consists of an adenine base, a ribose sugar, and two phosphate groups.

2. **Structure of ADP**:
- The structure of ADP includes:
- One adenine nitrogenous base.
- One ribose sugar.
- Two phosphate groups (P).

3. **Types of Bonds in ADP**:
- The phosphate groups in ADP are connected by specific types of bonds:
- **Phosphoanhydride bond**: This is a high-energy bond that exists between the two phosphate groups.
- **Phosphoester bond**: This bond connects the ribose sugar to the first phosphate group, but it is not considered a high-energy bond.

4. **Counting High-Energy Bonds**:
- In ADP, there is **one phosphoanhydride bond** between the two phosphate groups, which is the only high-energy bond present.
- Therefore, ADP has **one high-energy bond**.

5. **Conclusion**:
- Based on the analysis, the correct answer to the question "Which is correct for ADP?" is that ADP contains **one high-energy bond**.

### Final Answer:
**One high-energy bond**.

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