Question:
EcoR1 enzyme recognizes the sequence GAATTC. A stretch of linear DNA with six sites will give rise to
EcoR1 enzyme recognizes the sequence GAATTC. A stretch of linear DNA with six sites will give rise to
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Linear DNA: Fragments = Sites + 1.
Updated On: May 14, 2026
- 8 fragments
- 7 fragments
- 6 fragments
- 5 fragments
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Restriction enzymes cut DNA at specific recognition sites.
Step 2: Meaning
The number of fragments produced depends on whether the DNA molecule is linear or circular.
Step 3: Analysis
For a linear DNA molecule, the number of fragments is always $n + 1$, where $n$ is the number of cleavage sites. With 6 sites, the calculation is $6 + 1 = 7$ fragments.
Step 4: Conclusion
Six sites on a linear DNA stretch result in 7 fragments. Final Answer: (B)
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