Which base is incorporated into RNA in place of thymine found in DNA?

In which direction does RNA polymerase synthesize RNA?

Which of the following describes the role of a promoter in transcription?

After the transcription process, the mRNA undergoes splicing before it exits the nucleus. What happens during the splicing process?

The following graph shows percent polymerase activity after incubating the liver cells with different concentrations of α-amanitin. Determine the concentration of the toxin at which you will observe a 60% shutdown in the activity of the polymerase.