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Binding of specific protein on regulatory DNA sequence can be studied by means of

1. ultra centrifugation
2. electron microscope
3. light microscope
4. X-ray crystallography

Correct answer: X-ray crystallography

Solution

X-ray crystallography is used to determine the three-dimensional structure of protein–DNA complexes at very high resolution. That makes it suitable for studying specific binding of a protein to a regulatory DNA sequence.

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