Question

select all that apply
bacterial cytoskeleton proteins share ancestry with which two eukaryotic proteins?
□ tubulin
□ actin
□ histone
□ aequorin
□ flagellin

Explanation:

To solve this, we recall the evolutionary relationships of bacterial cytoskeleton proteins. Bacterial cytoskeleton - related proteins (like MreB and FtsZ) have evolutionary ancestry with eukaryotic actin and tubulin respectively. MreB is related to actin (involved in cell shape and movement - like functions), and FtsZ is related to tubulin (involved in cell division - like functions). Histone is for DNA packaging, aequorin is a calcium - sensing protein, and flagellin is for bacterial flagella structure, none of which share ancestry with bacterial cytoskeleton proteins in the relevant way.

Answer:

A. tubulin, B. actin