Find out the wrongly matched nitrogen base with its category to which it belongs?

Options

A. Thymine, Uracil - Pyrimidines
B. Uracil, Cytosine - Pyrimidines
C. Guanine, Adenine - Purines
D. Adenine, Thymine - Purines

Explanation

To solve the question of finding the wrongly matched nitrogen base with its category, we will follow these steps:

### Step 1: Understand the Categories of Nitrogen Bases
Nitrogen bases are categorized into two main groups: purines and pyrimidines.

- **Purines**: These are larger molecules and include adenine (A) and guanine (G).
- **Pyrimidines**: These are smaller molecules and include cytosine (C), thymine (T), and uracil (U).

### Step 2: Analyze the Given Options
We need to evaluate the options provided in the question to identify any incorrect pairings.

1. **Pyrimidines are thymine and uracil** - This is correct because both thymine and uracil are indeed pyrimidines.
2. **Pyrimidines are cytosine and uracil** - This is also correct as both cytosine and uracil are pyrimidines.
3. **Purines are adenine and guanine** - This is correct since adenine and guanine are both purines.
4. **Purines are thymine and adenine** - This is incorrect because thymine is not a purine; it is a pyrimidine.

### Step 3: Identify the Wrongly Matched Pair
From the analysis, we can see that option 4 is the wrongly matched pair. Thymine should not be classified as a purine.

### Final Answer
The wrongly matched nitrogen base with its category is:
**Option 4: Purines are thymine and adenine.**

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