Nitrogenous base+sugar=____

Answer

To solve the question "Nitrogenous base + sugar = ____", we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Components**:
- We have two components: a nitrogenous base and a sugar.
- Nitrogenous bases are found in DNA and RNA, and they can be classified into two categories: purines (adenine and guanine) and pyrimidines (cytosine, thymine, and uracil).

2. **Understand the Types of Sugars**:
- The sugar can either be ribose (found in RNA) or deoxyribose (found in DNA).

3. **Combine the Components**:
- When a nitrogenous base is combined with a sugar, they form a specific structure.

4. **Identify the Resulting Structure**:
- The combination of a nitrogenous base and a sugar results in a structure known as a **nucleoside**.

5. **Clarification of Terms**:
- If a phosphate group is added to this combination (nitrogenous base + sugar), the resulting structure is called a **nucleotide**. However, since the question specifically asks for the combination of just a nitrogenous base and a sugar, we focus on the term nucleoside.

### Final Answer:
Nitrogenous base + sugar = **nucleoside**.

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