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)both choices A and B

Question

Quizplus · Accepted Answer

The fact that the mRNA molecules are longer than they should be suggests that the drug is interfering with transcription termination signals. Additionally, the low cell survival suggests that the drug is disrupting an essential cellular process, such as protein synthesis. Spliceosome activity is necessary for proper mRNA processing and could also be affected by the drug. Therefore, both choices A and B are the best options. Ribosomes and nucleoli are unlikely to be involved in this specific mechanism.

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