Question:
The following sequence read the same on two strands in 5' → 3' and 3' → 5' direction is called as:
The following sequence read the same on two strands in 5' → 3' and 3' → 5' direction is called as:
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Palindromic sequences are key targets for restriction enzymes like EcoRI.
Updated On: Jun 20, 2026
- Mismatch sequence
- Palindromic nucleotide sequence
- Zig zag sequence
- Recognition sequence
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The Correct Option is B
Solution and Explanation
Step 1: Understanding DNA strand directionality.
DNA strands run in opposite directions: one strand is 5' → 3' and the complementary strand is 3' → 5'.
Step 2: Concept of palindromic sequence.
A palindromic sequence is a DNA sequence that reads the same in both directions when complementary strands are considered.
Step 3: Biological importance.
Such sequences are often recognition sites for restriction enzymes in molecular biology.
Step 4: Evaluating options.
- Mismatch sequence: refers to incorrect base pairing.
- Zig zag sequence: not a biological term.
- Recognition sequence: general term, not directional property definition.
Step 5: Logical reasoning.
Since the sequence is identical in both directions, it is palindromic.
Step 6: Final conclusion.
Thus, the correct answer is palindromic nucleotide sequence.
DNA strands run in opposite directions: one strand is 5' → 3' and the complementary strand is 3' → 5'.
Step 2: Concept of palindromic sequence.
A palindromic sequence is a DNA sequence that reads the same in both directions when complementary strands are considered.
Step 3: Biological importance.
Such sequences are often recognition sites for restriction enzymes in molecular biology.
Step 4: Evaluating options.
- Mismatch sequence: refers to incorrect base pairing.
- Zig zag sequence: not a biological term.
- Recognition sequence: general term, not directional property definition.
Step 5: Logical reasoning.
Since the sequence is identical in both directions, it is palindromic.
Step 6: Final conclusion.
Thus, the correct answer is palindromic nucleotide sequence.
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