Genomic imprinting, DNA methylation, and histone acetylation are all examples of
A) genetic mutation.
B) chromosomal rearrangements.
C) karyotypes.
D) epigenetic phenomena.
E) translocation.
Answer: D
Learn More :
Biology
- Which of the following is most likely to have a small protein called ubiquitin attached to it?
- Which of the following experimental procedures is most likely to hasten mRNA degradation in a eukaryotic cell?
- Gene expression might be altered at the level of post-transcriptional processing in eukaryotes rather than prokaryotes because of which of the following?
- Transcription factors in eukaryotes usually have DNA binding domains as well as other domains that are also specific for binding. In general, which of the following would you expect many of them to be able to bind?
- Steroid hormones produce their effects in cells by
- In eukaryotes, general transcription factors
- During DNA replication,
- Two potential devices that eukaryotic cells use to regulate transcription are
- When DNA is compacted by histones into 10-nm and 30-nm fibers, the DNA is unable to interact with proteins required for gene expression. Therefore, to allow for these proteins to act, the chromatin must constantly alter its structure. Which processes contribute to this dynamic activity?
- If you were to observe the activity of methylated DNA, you would expect it to
- Which of the following mechanisms is (are) used to coordinate the expression of multiple, related genes in eukaryotic cells?
- There is a mutation in the repressor that results in a molecule known as a super-repressor because it represses the lac operon permanently. Which of these would characterize such a mutant?
- In positive control of several sugar-metabolism-related operons, the catabolite activator protein (CAP) binds to DNA to stimulate transcription. What causes an increase in CAP?
- If glucose is available in the environment of E. coli, the cell responds with a very low concentration of cAMP. When the cAMP increases in concentration, it binds to CAP. Which of the following would you expect to be a measurable effect?
- In response to chemical signals, prokaryotes can do which of the following?
- Altering patterns of gene expression in prokaryotes would most likely serve the organism's survival in which of the following ways?
- Allolactose, an isomer of lactose, is formed in small amounts from lactose. An E. coli cell is presented for the first time with the sugar lactose (containing allolactose) as a potential food source. Which of the following occurs when the lactose enters the cell?
- For a repressible operon to be transcribed, which of the following must occur?
- Transcription of the structural genes in an inducible operon
- The lactose operon is likely to be transcribed when
- A mutation that inactivates the regulatory gene of a repressible operon in an E. coli cell would result in
- Most repressor proteins are allosteric. Which of the following binds with the repressor to alter its conformation?
- Which of the following, when taken up by the cell, binds to the repressor so that the repressor no longer binds to the operator?
- A lack of which molecule would result in the cell's inability to "turn off" genes?
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.