Select a palindrome sequence from the following

Options

A. AC GC
TC CG
B. TA AC
AT TC
C. AT CT
AT GA
D. AA TT
TT AA

Answer

To solve the question of selecting a palindrome sequence from the given options, we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of a Palindrome Sequence**:
A palindrome sequence in the context of DNA or RNA is a sequence that reads the same in both directions. This means that if you read the sequence from the 5' to 3' direction, it should be identical to reading it from the 3' to 5' direction on the complementary strand.

2. **Analyze the Options**:
We need to evaluate each of the provided options (A, B, C, D) to determine if they meet the criteria of a palindrome sequence.

3. **Check Option A**:
- Given sequence: 5' - G G A T C C - 3'
- Complementary strand (3' to 5'): C C T A G G
- Reading from 5' to 3' gives G G A T C C, and from 3' to 5' gives C C T A G G.
- Since these sequences are not identical, Option A is **not** a palindrome.

4. **Check Option B**:
- Given sequence: 5' - C C T A G G - 3'
- Complementary strand (3' to 5'): G G A T C C
- Reading from 5' to 3' gives C C T A G G, and from 3' to 5' gives G G A T C C.
- These sequences are also not identical, so Option B is **not** a palindrome.

5. **Check Option C**:
- Given sequence: 5' - A T A T A - 3'
- Complementary strand (3' to 5'): T A T A T
- Reading from 5' to 3' gives A T A T A, and from 3' to 5' gives T A T A T.
- These sequences are not identical, thus Option C is **not** a palindrome.

6. **Check Option D**:
- Given sequence: 5' - A T T A A T - 3'
- Complementary strand (3' to 5'): T A A T T A
- Reading from 5' to 3' gives A T T A A T, and from 3' to 5' gives T A A T T A.
- These sequences are identical, confirming that Option D is a palindrome.

7. **Conclusion**:
Based on the analysis, the correct palindrome sequence is **Option D**.