In eukaryotes, DNA-binding proteins bind to DNA by which of the following DNA-binding structures?
A) the zinc-finger domain
B) the cAMP binding
C) closed loops called lariats
D) A and B
E) A, B, and C

Question

Quizplus · Accepted Answer

The zinc-finger domain is a common DNA-binding domain found in many transcription factors and other DNA-binding proteins. It binds to specific sequences of DNA through the coordination of zinc ions and specific amino acids in the domain. Choice B) refers to a completely different type of binding domain that binds cyclic AMP, and choice C) describes a completely different structure not involved in DNA binding. Therefore, the best choice is A).

In Eukaryotes, DNA-Binding Proteins Bind to DNA by Which of the Following