The action of a new drug is unknown,so you test various aspects of eukaryotic cell processes looking for an effect.You notice that the survival of cells exposed to this drug is very low.Further analysis shows that some proteins and mRNAs are much longer than they should be.One hypothesis is that the drug interferes with
A)transcription termination signals.
B)spliceosome activity.
C)ribosomes.
D)nucleoli.
E)either transcription termination signals or spliceosome activity.

Question

Quizplus · Accepted Answer

The observation that some proteins and mRNAs are much longer than they should be suggests that the drug interferes with processes that normally limit the length of these molecules. This could be due to interference with transcription termination signals, which would result in longer mRNAs by allowing transcription to continue past the normal stop point, or with spliceosome activity, which could result in longer proteins by including introns that are normally removed. Both scenarios would lead to the production of abnormally long proteins and mRNAs.

The Action of a New Drug Is Unknown,so You Test