Centromere is also called

Options

A. Chromomere
B. Secondary constriction
C. Primary constriction
D. Chromonema

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for another name for the centromere. The centromere is a crucial part of a chromosome that plays a role during cell division.

2. **Reviewing Options**: We need to analyze the provided options to determine which one correctly refers to the centromere. The options given are:
- a) Chromomere
- b) Secondary constriction
- c) Primary constriction
- d) Chromonema

3. **Analyzing Each Option**:
- **Chromomere**: This term refers to a segment of a chromosome. It does not relate to the function or structure of the centromere. Therefore, this option is incorrect.
- **Secondary Constriction**: This refers to a point on the chromosome where there is a constriction other than the centromere. Since it is not the centromere, this option is also incorrect.
- **Primary Constriction**: This term describes the narrow region where two sister chromatids are attached. This is indeed the definition of the centromere, making this option correct.
- **Chromonema**: This term refers to the thread-like structure that constitutes the chromosome. It is not synonymous with the centromere, so this option is incorrect.

4. **Conclusion**: After analyzing all options, the correct answer is **Primary Constriction**, which is another name for the centromere.

**Final Answer**: The centromere is also called the **Primary Constriction**.

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