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Epigenetic control of gene expression
a. is hereditary. c. adds methyl groups to cytosine.
b. locks genes “ON.” d. Two of these
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Solved in 2 steps
- Control of gene expression in eukaryotic cells occurs at which level(s)? a. only the transcriptional level b. epigenetic and transcriptional levels c. epigenetic, transcriptional, and translational levels d. epigenetic, transcriptional, post-transcriptional, translational, and post-translational levelsThe key to epigenetic regulation is ________. a. controlling accessibility to transcription factors and RNA polymerase binding b. biochemical modification of binding factors c. physical modification of the DNAEpigenetic marks regulate gene expression. Which epigenetic mark is NOT associated with positive gene expression? A. Histone acetylation B. Histone Methylation C. De-methylated DNA D. Methylated DNA
- Which of the following is NOT a description of an epigenetic modification? A. regulatory patterns that persisis in the absence of the original signal B. stable alterations in gene expression without changes to the underlying DNA sequence C. the persistence of gene expression patterns through cell division D. an intrinsic signal that triggers cell differentiationIn one cell, gene C is expressed, whereas in another cell, geneC is inactive. After the cells are fused experimentally, both copiesof gene C are expressed. This observation could be explained bya. a cis-epigenetic mechanism.b. a trans-epigenetic mechanism.c. DNA methylation.d. both a and b.Epigenetic modification of gene expressiona. always inhibits gene transcription.b. always stimulates gene expression.c. is erased from the DNA following mitotic cell division.d. may sometimes be transmitted from generation to generation.
- Translational control of gene expression occurs within thea. nucleus.b. cytoplasm.c. nucleolus.d. mitochondria.Epigenetic changes in gene regulation are caused by _ _ _ _ _ _ _ a. missing nucleotides or chromosomes b. modifications to histones and the DNA, but not the nucleotide sequence itself c. mutations of the nucleotide sequenceEpigenetic changes maya. be programmed during development.b. be caused by environmental changes.c. involve changes in the DNA sequence of a gene.d. be both a and b.
- Post-translational control refers to: a. regulation of gene expression after transcription b. regulation of gene expression after translation c. control of epigenetic activation d. period between transcription and translationSuggest a direct experiment to prove that p53 binding at gene promoters affects the level of gene expression of the corresponding genes.Which of the following is NOT a mechanism of control of gene expression Group of answer choices a. Co-dominance b. mRNA transport c. DNA Methylation d. Control of translation e. Control of transcription