Exam 15: Regulation of Gene Expression

One way scientists hope to use the recent knowledge gained about noncoding RNAs lies with the possibilities for their use in medicine.Of the following scenarios for future research,which would you expect to gain most from RNAs?

Transcription factors in eukaryotes usually have DNA-binding domains as well as other domains that are specific for binding other molecules.In general,which of the following would you expect many of them to be able to bind?

Which of the following environments would most likely lead to the transcription of the lactose operon?

Since Watson and Crick described the structure of DNA in 1953,which of the following statements might best explain why the function of small RNAs is still being explained?

A type of mutation in bacteria in the repressor results in a molecule known as a super-repressor because it represses the lac operon permanently.Which of the following processes would occur in such a mutant?

Which of the following processes do steroid hormones carry out to produce their effects?

Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome.If she moves the regulatory gene (lac I),along with its promoter,to a position some several thousand base pairs away from its normal position,which would you expect to occur?

Which of the following statements correctly describes the role of histone acetylation and DNA methylation in gene regulation?