A) It keeps the exons safe from infecting viral DNA.
B) Eukaryotes are able to then use the information in one DNA sequence in alternative ways.
C) It allows for multiple copies of instructions to be hidden within several chromosomes.
D) There appears to be no significance to this arrangement.What is the purpose in storing information in exons separated by introns?B is the best answer, though there are other things introns can do (and probably more we don't yet know about). Alternative processing of pre-mRNA from a given gene allows for multiple different proteins to be made from that one gene.
Viral insertion into an intron can still mess up normal gene function.
C doesn't make sense.
D is not true (because B is).
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