Q: Define chromatin-mediated repression.
A: Histone is the basic protein abundant in lysine and arginine residues, which are located in the…
Q: explain Scope of heterochromatin effects?
A: Chromatin means DNA +proteins (histones) or histones combine with DNA known as chromatin. Both the…
Q: Describe how P elements are used to producetransgenic Drosophila.
A: Genetics is a branch of science that deals in the study of genes, heredity, and genetic variation of…
Q: Describe how reversible chemical changes to histones are linked to chromatin modification.
A: Histones are basic proteins associated with DNA in the nucleus and allow it to condense in chromatin…
Q: Once pioneer transcription factors bind and attract chromatin remodelers, what do these chromatin…
A: The pioneer transcription factors are activators, they can associate with condensed chromatin. It…
Q: Outline the role of alternative splicing in the control of sex differentiation in Drosophila.
A: Alternative splicing is a regulated process in which a single gene coding for multiple proteins…
Q: Where do enhancers bind? Are enhancers gene specific
A:
Q: What three molecular mechanisms alter chromatin structure and are responsible for many epigenetic…
A: Step 1- A gene is the essential physical and useful unit of heredity. Genes are comprised of DNA…
Q: Briefly describe how mitotic recombination can result in loss of heterozygosity (LOH) at tumor…
A: Loss of heterozygosity (LOH) is the loss of one parent's contribution to cell and can be caused by…
Q: What is the difference between maintenance methylation and de novo methylation? In what cell types…
A: Methylation denotes the addition of methyl groups on a substrate, or substitution of an atom by…
Q: During S phase, how are histonesand their modifying enzymescontrolled to replicate…
A: Cells reproduce by a cycle of growing and dividing called a cell cycle. The cell cycle is the…
Q: Explain how telomerase expression contributes to theimmortality of cancer cells
A: The tumor cells are said to be immortal due to the expression if telomerase enzyme. The telomerase…
Q: Briefly describe three ways that ATP-dependent chromatin-remodeling complexes may change chromatin…
A: In past few years, for the identification and characterization of the ATP-dependent…
Q: Describe the molecular steps by which polycomb group complexescause epigenetic gene silencing.
A: The PcG protein complex (Polycomb group) is one of the two protein complexes involved in the…
Q: scribe how the acetylation of core histones may loosen chromatin packing.
A: DNA is the genetic material is usually found in all prokaryotic and eukaryotic cells. DNA is made up…
Q: Define the Chromatin Remodeling ?
A: Genes are the hereditary unit of an organism. The genes have DNA (deoxyribonucleic acid) which code…
Q: Define about Chromatin Remodeling ?
A: The DNA is packed into the nucleus by using the protein. The chromatin is a DNA- protein complex.…
Q: Explain the chromatin remodeling complexes ?
A: In eukaryotes, the DNA is firmly twisted and tightly coiled into a complex called Chromatin. This…
Q: How chromatin remodeling and chromatin modifications are necessary to make cis-acting regulatory…
A: In past few years, for the identification and characterization of the ATP-dependent…
Q: What are Sir proteins? How do mutations in SIR genes affect the expression of mating-type cassettes?
A: Mutations are genetic variations that are a major source of organismal variability. These…
Q: Describe how chromatin is remodeled to regulate gene expression in eukaryotes
A: Eukaryotes =Eu(true) +Karyon (nucleus). Organism with true nucleus is known as Eukaryotes.
Q: If histones are acetylated on a lysine amino acid (an epigenomic mark), are genes in this region…
A: Epigenetics is the branch of genetics that deals with changes in gene expression (no change in the…
Q: Q. Which of the following describes the role of acetylation during the chromatin remodeling that…
A: Euchromatin consists of genes that are ready to be transcribed and translated into protein,…
Q: Using the experimental system shown in Figure 12-26, ageneticist is able to insert a barrier…
A: Introduction: Heterochromatin is the darkly stained part of chromatin. The heterochromatin is…
Q: Since eukaryotic chromosomes are assembled with histone proteins, how are replication and…
A: Histone These are the proteins that are basic in nature as they are abundant in the amino acids…
Q: What are chromatin remodeling complexes?
A: Deoxyribonucleic acid or DNA is a double helix nucleic acid structure that carries the genetic…
Q: How is chromatin immunoprecipitation used to determine the locations of histone modifications in the…
A: Histone modifications occur through post-translational modifications of residues of amino acids like…
Q: Which of the following scenarios will cause the maternal X chromosome to condense into a Barr body?…
A: The following scenarios will cause the maternal X chromosome to condense into a barr body:. Option 2…
Q: Loosening the chromatin structure occurs because of Select one: a. Lysine methylation b. Lysine…
A: Euchromatin: Euchromatin is a type of chromatin (DNA, RNA, and protein) that is densely packed with…
Q: Describe two different ways that histone modifications may alter chromatin structure.
A: Chromosomes appear at the time of cell division in the form of thread like structures inside the…
Q: Why are there so many differentchromatin remodeling complexes incells? What are their essential…
A: Chromatin remodeling is one of the most important concepts. It uses the energy from the hydrolysis…
Q: Explain, How does histone acetylation alter chromatin structure?
A: DNA is the genetic material present in the cell.
Q: Explain how alternative splicing affects sex determination in Drosophila.
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: Describe what must happen for a cell type-specific gene to be transcribed in a cell of that type.
A: DNA is deoxyribonucleic acid, and it is the molecule that contains the genetic instructions housed…
Q: Histones can be modified to turn genes on and off. Which type of chromatin is associated with…
A: Chromatin is a complex form of DNA molecule and Histone protein which was found in eukaryotic…
Q: Explain Using Drosophila transgenes to link a mutant phenotype to a gene
A: A transformation is an arbitrary change in DNA which in this manner influences a gene as well as a…
Q: Suppose a chemist develops a new drug that neutralizes the positive charges on the tails of histone…
A: Nucleosome is a basic structural and functional repeating unit of chromatin. It is also a unit of…
Q: Describe the manner in which activators and repressors influencethe rate of transcription…
A: Introduction Protein is the key biomolecule in the biological system, any important physiological…
Q: Outline how histone methylation and acetylation affectchromatin structure and gene expression.
A: Gene expression may be done by the transcription of DNA into mRNA and formation of polypeptide…
Q: What are epigenetic marks? Which are associated withheterochromatin? How are epigenetic marks…
A: DNA/RNA is the genetic material of organisms. This genetic material is in charge of character…
Q: Outline how histone methylation and acetylation affectchromatin structure
A: Gene expression may be done by the transcription of DNA into mRNA and formation of polypeptide…
Q: Describe one way of mapping the location of histones on the gencome.
A: The DNA in a eukaryotic cell's nucleus is bundled into chromatin, whose fundamental building block,…
Q: Describe the function of telomere end-binding proteins
A: Introduction:The eukaryotic chromosomes are linear or rod-shaped having an end. during replication,…
Q: Describe how chromatin-remodeling complexes alter nucleosomes.
A: In order to control the gene expression, the regulatory transcription machinery proteins must access…
Q: How Distant Enhancer Sequences andInteractions with Chromatin InfluenceEukaryotic Promoters?
A: The promoter is the region of a gene sequence that binds to the RNA (ribonucleic acid) polymerase.…
Q: Give examples of constitutive and facultative heterochromatin in:a. Drosophilab. humans
A: The heterochromatin is a tightly packed form of DNA (deoxyribonucleic acid). These are classified…
Q: Define the epigenetic mechanisms - chromatin remodeling bythe addition or removal of chemical groups…
A: Introduction Expression of gene is highly under control by various mechanisms such as histone…
Q: Why Most Genes in HeterochromatinRegions Are Silenced?
A: Chromatin is the DNA packed with its packaging proteins.
Describe how chromatin remodeling complexes allow
gene expression to occur.
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