Which of the Following Could Be a Method Used to Label

Multiple Choice

Which of the following could be a method used to label microtubules with a fluorescent dye?

A) injecting tubulin with a fluorescent dye
B) coupling tubulin to a fluorescent dye
C) coupling actin to a fluorescent dye
D) inducing a cell to express the gene for tubulin that has been fused to the gene for GFP
E) coupling tubulin to a fluorescent dye and inducing a cell to express the gene for tubulin that has been fused to the gene for GFP