Genetic And Epigenetic Regulation - Biology How Life Work | Biology+

Course

Anatomy & Physiology

Study Pack

Set 1: Life: Chemical, Cellular, and Evolutionary Foundations

Set 2: The Molecules of Life

Set 3: Nucleic Acids and Transcription

Set 4: Translation and Protein Structure

Set 5: Organizing Principles: Lipids, Membranes, and Cell Compartments

Set 6: Making Life Work: Capturing and Using Energy

Set 7: Cellular Respiration: Harvesting Energy From Carbohydrates and Other Fuel Molecules

Set 8: Photosynthesis: Using Sunlight to Build Carbohydrates

Set 9: Cell Signaling

Set 10: Cell and Tissue Architecture: Cytoskeleton, Cell Junctions, and Extracellular Matrix

Set 11: Cell Division: Variations, Regulation, and Cancer

Set 12: Dna Replication and Manipulation

Set 13: Genomes

Set 14: Mutation and Dna Repair

Set 15: Genetic Variation

Set 16: Mendelian Inheritance

Set 17: Inheritance of Sex Chromosomes, Linked Genes, and Organelles

Set 18: The Genetic and Environmental Basis of Complex Traits

Set 19: Genetic and Epigenetic Regulation

Set 20: Genes and Development

Set 21: Evolution: How Genotypes and Phenotypes Change Over Time

Set 22: Species and Speciation

Set 23: Evolutionary Patterns: Phylogeny and Fossils

Set 24: Human Origins and Evolution

Set 25: Cycling Carbon

Set 26: Bacteria and Archaea

Set 27: Eukaryotic Cells: Origins and Diversity

Set 28: Being Multicellular

Set 29: Plant Structure and Function: Moving Photosynthesis Onto Land

Set 30: Plant Reproduction: Finding Mates and Dispersing Young

Set 31: Plant Growth and Development

Set 32: Plant Defense: Keeping the World Green

Set 33: Plant Diversity

Set 34: Fungi: Structure, Function, and Diversity

Set 35: Animal Nervous Systems

Set 36: Animal Sensory Systems and Brain Function

Set 37: Animal Movement: Muscles and Skeletons

Set 38: Animal Endocrine Systems

Set 39: Animal Cardiovascular and Respiratory Systems

Set 40: Animal Metabolism, Nutrition, and Digestion

Set 41: Animal Renal Systems: Water and Waste

Set 42: Animal Reproduction and Development

Set 43: Animal Immune Systems

Set 44: Animal Diversity

Set 45: Animal Behavior

Set 46: Population Ecology

Set 47: Species Interactions, Communities, and Ecosystems

Set 48: Biomes and Global Ecology

Set 49: The Anthropocene: Humans As a Planetary Force

Set 19 Genetic And Epigenetic Regulation

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Set 19 Genetic And Epigenetic Regulation

(Multiple Choice)

Free

A histone code is the:

A)nucleotide sequence of an individual histone protein's gene.
B)pattern of chemical modification of the DNA wrapped around an individual histone.
C)pattern of chemical modification of the histone tails.
D)number of amino acids in an individual histone that are methylated.
E)None of the other answer options is correct.

Answer

(Multiple Choice)

Free

Which of the following processes produce different proteins in different cells from the same primary transcript?

A)chromatin remodeling
B)histone modification
C)combinatorial control
D)alternative splicing
E)RNA editing

Answer

(Multiple Choice)

Free

A researcher notices that women working in the petrochemical industry who are exposed to aromatic hydrocarbons may have a greater incidence of breast cancer than women without such exposure. The researcher undertakes a study of the BRCA1 promoter using the restriction enzymes MspI and HpaII. MspI cleaves double-stranded DNA at 5'-CCGG-3' regardless of whether the CG in the middle has cytosine methylation, whereas HpaII cleaves double-stranded DNA at 5'-CCGG-3' only when the CG in the middle lacks cytosine methylation. For a region of double-stranded DNA in the promoter region of BRCA1, tumor cells from the breasts of exposed women with breast cancer and nontumor cells from breasts from the same women show the illustrated patterns of bands produced by MspI and HpaII:

A researcher notices that women working in the petrochemical industry who are exposed to aromatic hydrocarbons may have a greater incidence of breast cancer than women without such exposure. The researcher undertakes a study of the BRCA1 promoter using the restriction enzymes MspI and HpaII. MspI cleaves double-stranded DNA at 5'-CCGG-3' regardless of whether the CG in the middle has cytosine methylation, whereas HpaII cleaves double-stranded DNA at 5'-CCGG-3' only when the CG in the middle lacks cytosine methylation. For a region of double-stranded DNA in the promoter region of BRCA1, tumor cells from the breasts of exposed women with breast cancer and nontumor cells from breasts from the same women show the illustrated patterns of bands produced by MspI and HpaII: Which of the following statements are supported by this evidence? A)More sites are methylated in tumor cells than in nontumor cells. B)Fewer sites are methylated in tumor cells than in nontumor cells. C)The same sites are methylated in tumor cells as in nontumor cells. D)No sites are methylated in nontumor cells. E)The BRCA1 gene may be epigenetically silenced in tumor cells.

Which of the following statements are supported by this evidence?

A)More sites are methylated in tumor cells than in nontumor cells.
B)Fewer sites are methylated in tumor cells than in nontumor cells.
C)The same sites are methylated in tumor cells as in nontumor cells.
D)No sites are methylated in nontumor cells.
E)The BRCA1 gene may be epigenetically silenced in tumor cells.

Answer