Exam 18: Regulation of Gene Expression

Absence of bicoid mRNA from a Drosophila egg leads to the absence of anterior larval body parts and mirror-image duplication of posterior parts. This is evidence that the product of the bicoid gene

Most repressor proteins are allosteric. Which of the following molecules binds with the repressor to alter its conformation and therefore affect its function?

In colorectal cancer, several genes must be mutated for a cell to develop into a cancer cell. Which of the following kinds of genes would you expect to be mutated?

Which of the following statements correctly describes the primary difference between enhancers and proximal control elements?

The reason for differences in the sets of proteins expressed in a nerve and a pancreatic cell of the same individual is that nerve and pancreatic cells contain different ________.

Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If a researcher moves the operator to the far end of the operon, past the transacetylase (lacA) gene, which of the following processes would likely occur when the cell is exposed to lactose?

Which of the following methods is utilized by eukaryotes to control their gene expression that is different from the type of control found in bacteria?

Proto-oncogenes can change into oncogenes that cause cancer. Which of the following best explains the presence of these potential time bombs in eukaryotic cells?

Forms of the Ras protein found in tumors usually cause which of the following events to occur?

Which of the following molecules is a protein produced by a regulatory gene?

Which of the following molecules are involved in pattern formation during development?

A researcher introduces double-stranded RNA into a culture of mammalian cells and can identify its location or that of its smaller subsections experimentally, using a fluorescent probe. When she finds that the introduced strand separates into single-stranded RNAs, what other evidence of this single-stranded RNA piece's activity would she find?

Which of the following processes would allow the detection of alternative splicing of transcripts from a given gene?

Which of the following functions are characteristic of general transcription factors in eukaryotes?

Which of the following results would occur if the repressor of an inducible operon were mutated so that it could not bind the operator?

When taken up by a cell, which of the following molecules binds to a repressor so that the repressor no longer binds to the operator?

Which of the following statements best describes the characteristics of siRNA?

What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?

Under what conditions does the trp repressor block transcription of the trp operon?

The functioning of enhancers is an example of