The nitrogen base which is a constituent of the cell currency is

Options

A. Adenine
B. Guanine
C. Thymine
D. Cytosine

Answer

To solve the question regarding the nitrogen base that is a constituent of the cell currency, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Cell Currency**:
- The term "cell currency" typically refers to molecules that provide energy for cellular processes. The primary molecule that serves this function is ATP (adenosine triphosphate).

2. **Identify the Components of ATP**:
- ATP is made up of three main components: a nitrogenous base, a sugar (ribose), and three phosphate groups.

3. **Determine the Nitrogenous Base in ATP**:
- The nitrogenous base in ATP is adenine. This can be confirmed by looking at the structure of ATP, which includes adenine as its nitrogenous base.

4. **Differentiate Between Nitrogenous Bases**:
- There are several nitrogenous bases, including adenine, guanine, cytosine, thymine, and uracil. In the context of nucleotides:
- Purines: Adenine and Guanine
- Pyrimidines: Cytosine, Thymine, and Uracil

5. **Conclude the Answer**:
- Since adenine is the nitrogenous base found in ATP, which is the energy currency of the cell, the correct answer to the question is adenine.

### Final Answer:
The nitrogen base which is a constituent of the cell currency is **adenine**.

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