Exam 18: Regulation of Gene Expression

The fact that plants can be cloned from somatic cells demonstrates that ________.

DNA methylation and histone acetylation are examples of which of the following processes?

Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If a researcher moves the repressor gene (lacI), along with its promoter, to a position at some several thousand base pairs away from its normal position, which of the following results would be expected?

The cAMP receptor protein (CRP) is said to be responsible for positive regulation of the lac operon because ________.

Which of the following mechanisms is used to coordinate the expression of multiple, related genes in eukaryotic cells?

For a repressible operon to be transcribed, which of the following conditions must occur?

If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then

Which of the following processes do normal proto-oncogenes typically exhibit?

Which of the following conditions is most likely to cause the lactose operon to be transcribed?

Which of the following are maternal effect genes that control the orientation of the egg and thus the Drosophila embryo?

Which of the following processes would result from a mutation that deactivates a regulatory gene of a repressible operon in an E. coli cell?

Which of the following is an example of post-transcriptional control of gene expression?

When the Bicoid protein is expressed in Drosophila, divisions between cells in the embryo are not yet fully developed. This information helps to explain which observation by Nüsslein-Volhard and Wieschaus?

The bicoid gene product is normally localized to the anterior end of the embryo. If large amounts of the product were injected into the posterior end as well, which of the following developmental events would occur?

Mutations in which of the following genes lead to transformations in the identity of entire body parts?

According to the lac operon model proposed by Jacob and Monod, what is predicted to occur if the operator is removed from the operon?

A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. In one set of experiments, she succeeded in increasing acetylation of histone tails in the chromatin of the cells. Which of the following results would she most likely see in these cells?

Within a cell, the amount of protein made using a given mRNA molecule depends partly on

There is a mutation that is found in E. coli in the repressor that results in a molecule known as a super-repressor because it represses the lac operon permanently. Which of the following characteristics would you expect to observe in such a mutant?

Among the newly discovered small noncoding RNAs, one type helps to reestablish ethylation patterns during gamete formation and blocks expression of some transposons. Which of the following types of RNA is responsible for this function?