Regulatory proteins can identify specific sequences on the DNA double helix without unwinding the helix.This is accomplished by
A)inserting DNA promoters into either the major groove or the minor groove of the double helix where the edges of the nitrogen bases protrude.
B)inserting DNA-binding motifs into the minor groove of the double helix where the edges of the nitrogen bases protrude.
C)inserting DNA polymerase into the major groove of the double helix where the edges of the nitrogen bases protrude.
D)inserting RNA polymerase into the major groove of the double helix where the edges of the nitrogen bases protrude.
E)inserting DNA-binding motifs into the major groove of the double helix where the edges of the nitrogen bases protrudE.

Question

Quizplus · Accepted Answer

Regulatory proteins use DNA-binding motifs, which are specific sequences of amino acids that fit into the grooves of the DNA double helix, to identify specific sequences on the DNA without unwinding the helix. These motifs are usually inserted into the major groove where the edges of the nitrogen bases protrude, allowing the protein to recognize a specific sequence of bases. Therefore, option E is the correct choice.

Regulatory Proteins Can Identify Specific Sequences on the DNA Double