Researchers have identified and sequenced the genes encoding proteins associated with nuclear pores in both yeast and vertebrates.They have used these data to determine the amino acid sequences of these proteins and have applied molecular modeling techniques to predict the three-dimensional structures of the proteins.All contain nearly identical folding regions that may serve to hold lipid membranes in sharp curves.Because this finding has been demonstrated in both yeast and vertebrates (representing organisms that diverged long ago in evolutionary history), it provides evidence of a possible mechanism for the evolution of a subcellular structure.Which subcellular structure is this?
A) Cell membrane
B) Mitochondrion
C) Plastid
D) Endomembrane system
E) Chloroplast

Question

Quizplus · Accepted Answer

The subcellular structure being referred to in the passage is the nuclear pore complex, which is a part of the endomembrane system. The research findings suggest a possible mechanism for the evolution of this structure, as similar folding regions have been identified in proteins associated with nuclear pores in both yeast and vertebrates.

Researchers Have Identified and Sequenced the Genes Encoding Proteins Associated