The undefined nuclear region of prokaryotes are also known as

Options

A. nucleus
B. nucleolus
C. nucleic acid
D. nucleoid

Explanation

**Step-by-Step Solution:**

1. **Understanding Prokaryotes**: Prokaryotes are simple, unicellular organisms that lack a well-defined nucleus and other membrane-bound organelles. Examples include bacteria and archaea.

2. **Nuclear Region in Prokaryotes**: In prokaryotic cells, the genetic material is not enclosed within a membrane-bound nucleus. Instead, it is located in a region of the cell that is not well-defined.

3. **Terminology**: The poorly defined nuclear region in prokaryotes is referred to as the "nucleoid." This term specifically describes the area where the DNA is concentrated, but it does not have the structure of a true nucleus.

4. **Key Characteristics of Nucleoid**:
- Lacks a nuclear membrane.
- Contains the genetic material (DNA) of the prokaryote.
- Is not surrounded by any organelles.

5. **Conclusion**: Therefore, the undefined nuclear region of prokaryotes is known as the "nucleoid."

**Final Answer**: The undefined nuclear region of prokaryotes is known as the **nucleoid**.

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