All of the following, except one, down-regulate genes. Which is the one factor below that up-regulates genes? Activator transcription factors O Frameshift mutation near the beginning of the coding region O microRNA Nonsense mutation near the beginning of the coding region O Repressor transcription factors

Alternative splicing happens in both pro- and eukaryotes. True O False The yeast Gal80 protein inhibits transcription, but by binding to a transcriptional activator protein instead of to an operator. True O False

Differential lengths of poly-A tails affect mRNA stability. Pre-transcriptional control Transcriptional control Translational control O Post-translational control

If the operator gene is a non-transcribable region of DNA, and the promoter is upstream of the operator, what does this mean for the operator gene during transcription? Does it get removed before? Or is it always an intron that gets spliced out?

Which of the following cis regulatory elements are present in the pre-mRNA sequence? SRs hnRNPs ESES All of the above

Which of the following correctly shows different regulatory mechanisms ranked from fastest to slowest? Answers A -E A. Phosphorylation; Allosteric Regulation; Transcriptional Regulation Allosteric Regulation; Phosphorylation; Transcriptional Regulation C Phosphorylation; Transcriptional Regulation; Allosteric Regulation Transcriptional Regulation; Phosphorylation; Allosteric Regulation Allosteric Regulation, Transcriptional Regulation; Phosphorylation

How do activators facilitate transcription? Activator (inactive) Activator- binding site RNA polymerase Promoter Transcription normally off. RNA polymerase cannot bind to the promoter unless the activator is bound to the activator-binding site, but the activator is in an inactive form. Inducer Activator (active) Inducer helps turn transcription on. Transcription Inducer binds to the activator and changes its shape, allowing the activator to bind to the site. RNA polymerase can then bind to the promoter and initiate transcription.

Which of the following sequences would most likely be the site of the initiation of transcription? ТАТАААТА GCTAGCTA GGCGGCCC Impossible to tell

How would the removal of the TATA box in a eukaryotic gene impact transcription? Group of answer choices The gene would not be transcribed Transcription would occur more slowly Transcription would occur in the wrong direction Transcription would be less processive The wrong strand would be used as a template for synthesis

Inverted repeats in the DNA sequence being transcribed can lead to mRNA molecule that forms a hairpin loop and is often used terminate transcription. The transcription process supercolls DNA. the first statement is true. the second statement is false. the first statement is false. the second statement is true. Both statements are true. Both statements are false.