Exam 19: Regulation Of Gene Expression In Eukaryotes

Whenever the RNA within the RISC pairs imperfectly with its target sequence,the mRNA is usually not cleaved; instead,translation of the mRNA is inhibited.RISC-associated RNAs that have this effect are usually termed

How does alternative splicing modify an RNA transcript to allow for the production of different polypeptides?

At which level is the gene expression of eukaryotes regulated?

Which of the following can affect RNA transcript stability in the cytoplasm?

In the human genes for b-globin,a locus control region is characterized by

If gene expression is regulated at the transcriptional level,where in a eukaryotic cell does this regulation take place?

Which of the following can increase gene expression?

A group of proteins that help to stabilize the internal cellular environment when organisms are subjected to the stress of high temperature are known as

Which of the following motifs is not characteristic of a eukaryotic transcription factor?

Which of the following statements is correct?

Which of the following gives support to the idea that transcription takes place in "open" regions of the chromosome? 1)The fact that 3H-uridine incorporated into newly synthesized RNA is localized around the lateral loops of the lampbrush chromosomes rather than around the condensed axes in amphibian oocytes. 2)The study of polytene chromosomes in Drosophila and other Dipteran insects 3)The study of lambrush chromosomes in human oocytes

Hormone-induced gene expression is mediated by specific sequences in the DNA known as

Which of the following can be responsible for silencing a gene? 1)Protein complexes like the Polycomb complex 2)Methylation of DNA 3)Telomeric variant surface glycoprotein like vsg

How can an external environmental factor cause the regulation of gene expression in eukaryotes? Explain your answer by providing a real life example such as the heat shock proteins in Drosophila.

Which of the following is true of enhancer sequences?

The temporal sequence of puffing in polytene chromosomes is controlled by

Where does RNA transcript modification occur in eukaryotic cells?

In one individual euchromatic genes are artificially transposed to a heterochromatic environment,resulting in a mixture of normal and mutant characteristics.This is called

All of the following statements are true regarding inactivation of X-chromosome in mammals,except:

How does the phenomenon of RNA interference regulate gene expression on a post-transcriptional level?