Exam 16: Regulation of Gene Expression

"Genomic imprinting" is a term for epigenetic changes that are passed down to offspring.Sometimes a particular gene is silenced when it comes from the sperm genome, as opposed to the egg genome.This silencing could be preserved during growth of the embryo through the action of _______.

In brain tissue, alternative splicing in humans is _______ frequent than it is in chimpanzees, allowing for _______ different proteins per gene in humans than in chimpanzees.

What is the main difference between general and specific transcription factors?

How does gene regulation differ between prokaryotes and multicellular eukaryotes?

RNA viruses may be the source for

To be activated, the CRP must first bind

Eukaryotic gene regulation differs from prokaryotic gene regulation in that

If a mutation in a silencer makes it much harder for proteins to bind to it, which is most likely to occur?

In the lac operon system, CRP acts as a(n)

Transcription factors are

The site on the operon DNA where a repressor binds is called the _______ sequence.

Some metabolic pathways are regulated in part by changes in the rate of degradation of key enzymes.This is an example of

What usually occurs at CpG islands?

Refer to the figure showing positive and negative regulation. Which system would be more likely to respond to the presence of a specific carbon source (not glucose or lactose), and why?

Inducible and repressible systems are similar in that

In which organisms would you not expect to find miRNA gene-silencing mechanisms?

Two identical twins showed very similar methylation patterns when they were 4 years old, but these patterns diverged considerably by the time they were 40 years old.What is the most likely explanation for this?

Refer to the figure showing the reproductive cycle of a typical lytic virus. Which number identifies an early protein that stimulates late gene production?

If a mutation causes a reduction in the production of demethylase, the expected effect will be _______ in the amount of overall methylation and therefore _______ in overall gene expression.

Which of the following is a strategy that a virus could use in order to ensure viral reproduction in the host cell?