Biology 8th Edition by Kenneth Mason ,Jonathan Losos,Susan Singer,Peter Raven,George Johnson

تمرين 1

Regulatory proteins interact with DNA by
A) unwinding the helix and changing the pattern of base-pairing.
B) binding to the sugar-phosphate backbone of the double helix.
C) unwinding the helix and disrupting base-pairing.
D) binding to the major groove of the double helix and interacting with base-pairs.