How Does a Regulatory Protein That Binds to a Specific

Multiple Choice

How does a regulatory protein that binds to a specific DNA sequence recognize this sequence?

A) The regulatory protein opens up the two strands of DNA and detects the bases on one of the strands.
B) The regulatory protein opens up the two strands of DNA and detects the bases on both strands.
C) The regulatory protein detects the portions of the base pairs that project into the grooves of double-stranded DNA.
D) The regulatory protein detects specific sequences in the sugar-phosphate backbone of one of the DNA strands.
E) The regulatory protein detects specific sequences in the sugar-phosphate backbone of both of the DNA strands.