The specific DNA sequence where EcoRI cuts is

Options

A. GATTCG
B. GAATTC
C. GTTCAA
D. TTCCAA

Answer

**Step-by-Step Solution:**

1. **Understanding Restriction Enzymes**: Recognize that EcoRI is a restriction enzyme, which is a type of protein that can cut DNA at specific sequences. These enzymes are crucial in biotechnology for manipulating DNA.

2. **Identifying the Specific Sequence**: The specific DNA sequence where EcoRI cuts is known to be a palindromic sequence. This means that the sequence reads the same forwards and backwards on complementary strands.

3. **Recognizing the Sequence**: The specific sequence that EcoRI recognizes and cuts is G A A T T C. This means that when EcoRI encounters this sequence in a DNA strand, it will make a cut.

4. **Complementary Sequence**: The complementary sequence to G A A T T C on the opposite strand would be C T T A A G. This is important because restriction enzymes often cut between specific nucleotides in the sequence.

5. **Understanding Palindromic Nature**: The sequence G A A T T C is palindromic because if you read it from the 5' to 3' direction on one strand, it is the same as reading it from the 3' to 5' direction on the complementary strand.

6. **Conclusion**: Therefore, the specific DNA sequence where EcoRI cuts is G A A T T C.

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