In the given segment DNA strand the base sequence on the opposite strands are same when read in opposite directions . Such sequences are known as of basis pairs.
5'.....GAATTCC……....3'
3'.....CCTTAAG ……..5'

Options

A. Replication sequence
B. Deletion mutation
C. Origin of replication .
D. Palindromic sequence

Answer

To solve the question, we need to analyze the given DNA sequences and determine the type of sequence they represent.

### Step-by-Step Solution:

1. **Identify the DNA Sequences**:
The question provides two strands of DNA:
- Strand 1 (5' to 3'): 5' - GAATTCC - 3'
- Strand 2 (3' to 5'): 3' - CCTTAAG - 5'

2. **Read the Sequences in Opposite Directions**:
- For Strand 1, if we read it from 5' to 3', we get: GAATTCC.
- For Strand 2, if we read it from 3' to 5', we get: CCTTAAG.
- Now, if we read Strand 2 in the 5' to 3' direction, we need to reverse it: 5' - AAGTTCC - 3'.

3. **Check for Complementarity**:
- The sequence of Strand 1 (5' - GAATTCC - 3') and the reverse of Strand 2 (5' - AAGTTCC - 3') are not identical.
- However, if we look closely, the bases are complementary and can be paired:
- G pairs with C
- A pairs with T
- T pairs with A
- C pairs with G
- This shows that both strands are complementary and can be read in opposite directions.

4. **Identify the Type of Sequence**:
- The sequences are the same when read in opposite directions, which is a characteristic of a **palindromic sequence**.
- Palindromic sequences are recognized by restriction enzymes and can be read the same way in both directions.

5. **Select the Correct Option**:
- Based on the analysis, the correct answer is **palindromic sequence**.

### Final Answer:
The sequences are known as **palindromic sequences**.

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