If the mitosomes of Giardia contain no DNA, yet are descendants of what were once free-living organisms, then where are we likely to find the genes that encode their structures?
A) plasmids
B) mitochondria
C) nucleus
D) chloroplasts

Question

Quizplus · Accepted Answer

The genes that encode the structures of mitosomes, which are descendants of free-living organisms but contain no DNA themselves, are likely to be found in the nucleus. This is because, over evolutionary time, the genes from the ancestral free-living organism would have been transferred to the host cell's nucleus.

If the Mitosomes of Giardia Contain No DNA, Yet Are