The area of DNA rich in A - T base pairs is called

Options

A. high melting area
B. low melting area
C. microsatellite
D. pallindrome

Answer

To solve the question regarding the area of DNA rich in A-T base pairs, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding DNA Structure**:
- DNA is composed of four nitrogenous bases: Adenine (A), Thymine (T), Guanine (G), and Cytosine (C).
- Adenine pairs with Thymine through two hydrogen bonds, while Guanine pairs with Cytosine through three hydrogen bonds.

2. **Melting Points of DNA Regions**:
- The strength of the bonds between the base pairs affects the melting point of the DNA.
- Regions rich in A-T pairs (which have two hydrogen bonds) are generally easier to separate than regions rich in G-C pairs (which have three hydrogen bonds).
- Therefore, A-T rich regions are referred to as low melting point regions.

3. **Identifying the Correct Term**:
- The question asks specifically for the area of DNA that is rich in A-T base pairs.
- Based on the understanding that A-T pairs lead to lower melting points, we can conclude that this area is known as the "low melting point region."

4. **Conclusion**:
- The area of DNA rich in A-T base pairs is called the **low melting point region**.

### Final Answer:
The area of DNA rich in A - T base pairs is called **low melting point region**.

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