What Fundamental Question Were the Scientists in These Projects Asking

Multiple Choice

What fundamental question were the scientists in these projects asking?

A) Were tubulin and actin in ancestors common to prokaryotes and eukaryotes?
B) Were tubulin and actin in ancestors common to eukaryotes?
C) Are tubulin and actin in eukaryotes?
D) What is the structure of bacterial tubulin and actin?
E) Will bacterial tubulin and actin function in a eukaryotic cell?