Methylene blue can be used to stain DNA because it
A) changes the pH and therefore the structure of DNA.
B) is an effective fixing agent for nucleic acids.
C) covalently bonds with DNA.
D) forms ionic bonds with DNA.
E) makes DNA electron dense.

Question

Quizplus · Accepted Answer

Methylene blue stains DNA by forming ionic bonds with the negatively charged phosphate groups in the DNA backbone.

Methylene Blue Can Be Used to Stain DNA Because It