If one compares the base sequences of related genes from different species,one is likely to find that corresponding _________ are usually conserved,but the sequences of __________are much less well conserved.
A)introns; proteins
B)introns; chaperons
C)introns; exons
D)exons; introns
E)chaperons; exons

Question

Quizplus · Accepted Answer

Exons are the coding regions of genes that are expressed as proteins and are therefore under selective pressure to be conserved. In contrast, introns are non-coding regions and can accumulate mutations without affecting the final protein product. Therefore, exons are usually conserved while introns are less conserved.

If One Compares the Base Sequences of Related Genes from Different