In the nucleotide namely adenosine-5'-tri phosphate, the sequence of linkages among N(base), C(sugar) and P(phosphate) is

Options

A. `C-P-N-P-P`
B. `N-C-P-P-P`
C. `P-C-N-P-P`
D. `P-P-P-C-N`

Answer

To determine the sequence of linkages among the nitrogen base (N), carbon sugar (C), and phosphate (P) in adenosine-5'-triphosphate (ATP), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components of ATP**:
- ATP consists of three main components:
- A nitrogenous base (adenine)
- A ribose sugar (which is a five-carbon sugar)
- Three phosphate groups

2. **Understand the Structure**:
- The structure of ATP can be visualized as follows:
- The three phosphate groups are linked together in a chain.
- The last phosphate group (the one furthest from the ribose) is connected to the ribose sugar.
- The ribose sugar is then connected to the nitrogenous base (adenine).

3. **Determine the Linkage Sequence**:
- The sequence of linkages can be described as:
- The first phosphate (P) is linked to the second phosphate (P).
- The second phosphate (P) is linked to the third phosphate (P).
- The third phosphate (P) is linked to the ribose sugar (C).
- The ribose sugar (C) is linked to the nitrogen base (N).

4. **Write the Linkage Sequence**:
- Based on the above understanding, the sequence of linkages can be summarized as:
- P (first phosphate) → P (second phosphate) → P (third phosphate) → C (ribose sugar) → N (adenine base).
- This can be represented as: **PPPCN**.

5. **Select the Correct Option**:
- Among the given options, the correct sequence of linkages is **PPPCN**.

### Final Answer:
The sequence of linkages among nitrogen base, carbon sugar, and phosphate in adenosine-5'-triphosphate is **PPPCN**.

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