Which proteins would probably be the most similar between humans and fruit flies?

Question

Quizplus · Accepted Answer

Cellular respiration is a fundamental process necessary for the survival of all living organisms, and the proteins involved in this process are highly conserved across species. As a result, the proteins used in cellular respiration are likely to be the most similar between humans and fruit flies. While proteins in nerve cells, visual receptors, and taste receptors may also be conserved across species, they are more specialized and may have undergone greater evolutionary divergence.

Which Proteins Would Probably Be the Most Similar Between Humans