Homework Answers
34. (B) , Explanation : Presence of ATP or dATP is required for
initiation process of transcription.
35. (D) , Explanation : With the help of histones (H2A,H2B,H3,H4)
the nucleosome fiber form template that required in transcription
process .
36. (A) , Explanation : the hydrophobic side of leucine residue
forms dimerization with itself or with another helix that is
similar.
37. (D)
43. (D), Explanation : Histone methylation associated with gene
activation,gene repression, or induction.
44. (A)
45. (A), Explanation : Cytosine and adenine - these two bases can
be methylated.
46. (A), Explanation : Heterochromatic results from di- and
tri-methylation of a part (H3K9) of genome.
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ton is not an energy dependent process in (B)) Falls eukaryotes 43. Histone methylation is associated...
Which statements about the modification of chromatin structure in eukaryotes are true? 2 pts a. Acetylation...
Which statements about the modification of chromatin structure in eukaryotes are true? 2 pts a. Acetylation of histone tails in chromatin allows access to DNA for transcription. b. Histone proteins are always permanently placed along a DNA sequence but the binding to DNA can be loosened. c. Methylation of DNA is associated with the gene activation. d. Acetylation of histone tails is a reversible process. e. Some forms of chromatin modification can be passed on to future generations of cells.
Regulation of Gene Expression in Eukaryotes Part A -Modification of chromatin structure Which statements about the...
Regulation of Gene Expression in Eukaryotes Part A -Modification of chromatin structure Which statements about the modification of chromatin structure in eukaryotes are true? Select all that apply. View Available Hint(s) Acetylation of histone tails is a reversible process Some forms of chromatin modification can be passed on to future generations of cells. DNA is not transcribed when chromatin is packaged tightly in a condensed form. O Acetylation of histone tails in chromatin allows access to DNA for transcription. Deacetylation...
Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the...
Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the structure of chromatin around a particular gene. One of these mechanisms is the covalent modification of histones to switch DNA between an open and closed confirmation. A second mechanism is the covalent modification of DNA (typically on cytosines) by methylation. A. Describe a type of histone modification and explain what effect is has on chromatin, and how that effect is achieved. a. One type...
A genetically engineered plasmid Ficarries all of the elements of the lac operon, but replaces the...
A genetically engineered plasmid Ficarries all of the elements of the lac operon, but replaces the structural genes with the reporter gene green fluorescent protein (GFP). The repressor allele cannot bind lactose, and the OC allele cannot be bound by the repressor. Given the following genotypes and growth media that does not contain glucose, indicate in the table below whether you expect to see b-galactosidase activity and glowing green colonies of E. coli by selecting Yes or No. growth media...
onaformation from a ee is used in the synthesisof 17 functional gene product. A) Geno B)...
onaformation from a ee is used in the synthesisof 17 functional gene product. A) Geno B) Gene regulation C) Epigenetics D) Imprinting E) Chromatin remodeling 18. A histone code is the: A) B) nucleotide sequence of an individual histone protein's gene. pattern of chemical modification of the DNA wrapped around an individual histone. C) D) E) pattern of chemical modification of the histone tails. number of amino acids in an individual histone that are methylated None of the other answer...
The observation that in any DNA sample, A T and G C A. DNase sequencing An...
The observation that in any DNA sample, A T and G C A. DNase sequencing An analytical method that determines which segments of DNA are bound by a particular B. Chargaff's rule protein factor, such as a transcription factor C. ChIP sequencing D. Euchromatin E. Histone acetylation F. major groove - # Areas associated with a eukaryotic gene that are where most DNA methylation occurs. # An analytical technique that involves a small slide or chip with many segments of...
Question: In eukaryotes, miR-5 is a microRNA with sequence complementarity to the 3’UTR of the mRNA...
Question: In eukaryotes, miR-5 is a microRNA with sequence complementarity to the 3’UTR of the mRNA transcript encoded by the ABC gene. The ABC gene encodes for a protein that acts as an allosteric activator of the protein p101. The p101 protein is a histone acetyl transferase (HAT) which is an enzyme that acetylates histones when the protein is in its active form. A. In a lung cancer cell line, the p101 protein is overly active leading to misregulation of...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change to DNA sequence. B. Alternative splicing. C. Export of mRNA from the nucleus. D. Transcriptional repression. E. Destruction of mRNA Q2) Trans-acting regulators of gene expression include? A. promoters. B. histone deacetylases C. introns D. silencers E. the TATA box. Q3) Gene regulation in eukaryotes often involves which of the following, which are not also used by prokaryotes? A.RNA polymerase B.Transcription factors C.Histone modification...
In eukaryotes, miR-5 is a microRNA with sequence complementarity to the 3 UTR of the mRNA...
In eukaryotes, miR-5 is a microRNA with sequence complementarity to the 3 UTR of the mRNA transcript encoded by the UCD gene. The UCD gene encodes for a protein that acts as an allosteric activator of the protein p101. The p101 protein is a histone acetyl transferase (HAT) which is an enzyme that acetylates histones when the protein is in its active form In a lung cancer cell line, the p101 protein is overly active leading to misregulation of gene...
Two identical twins who showed very similar methylation patterns when they were 4 years old show...
Two identical twins who showed very similar methylation patterns when they were 4 years old show very divergent patterns at age 40. This divergence is most likely due to a different alternative splicing in the two individuals Ob different levels of histone acetyltransferase in the two individuals. Oc environmental differences that they experienced as adults. O d. different genomic imprinting in the two individuals. O e differences in their experiences in utero Suppose that a certain enzyme is synthesized whenever...
Regulation of Gene Expression in Eukaryotes Part A -Modification of chromatin structure Which statements about the modification of chromatin structure in eukaryotes are true? Select all that apply. View Available Hint(s) Acetylation of histone tails is a reversible process Some forms of chromatin modification can be passed on to future generations of cells. DNA is not transcribed when chromatin is packaged tightly in a condensed form. O Acetylation of histone tails in chromatin allows access to DNA for transcription. Deacetylation...
Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the structure of chromatin around a particular gene. One of these mechanisms is the covalent modification of histones to switch DNA between an open and closed confirmation. A second mechanism is the covalent modification of DNA (typically on cytosines) by methylation. A. Describe a type of histone modification and explain what effect is has on chromatin, and how that effect is achieved. a. One type...
A genetically engineered plasmid Ficarries all of the elements of the lac operon, but replaces the structural genes with the reporter gene green fluorescent protein (GFP). The repressor allele cannot bind lactose, and the OC allele cannot be bound by the repressor. Given the following genotypes and growth media that does not contain glucose, indicate in the table below whether you expect to see b-galactosidase activity and glowing green colonies of E. coli by selecting Yes or No. growth media...
onaformation from a ee is used in the synthesisof 17 functional gene product. A) Geno B) Gene regulation C) Epigenetics D) Imprinting E) Chromatin remodeling 18. A histone code is the: A) B) nucleotide sequence of an individual histone protein's gene. pattern of chemical modification of the DNA wrapped around an individual histone. C) D) E) pattern of chemical modification of the histone tails. number of amino acids in an individual histone that are methylated None of the other answer...
The observation that in any DNA sample, A T and G C A. DNase sequencing An analytical method that determines which segments of DNA are bound by a particular B. Chargaff's rule protein factor, such as a transcription factor C. ChIP sequencing D. Euchromatin E. Histone acetylation F. major groove - # Areas associated with a eukaryotic gene that are where most DNA methylation occurs. # An analytical technique that involves a small slide or chip with many segments of...
In eukaryotes, miR-5 is a microRNA with sequence complementarity to the 3 UTR of the mRNA transcript encoded by the UCD gene. The UCD gene encodes for a protein that acts as an allosteric activator of the protein p101. The p101 protein is a histone acetyl transferase (HAT) which is an enzyme that acetylates histones when the protein is in its active form In a lung cancer cell line, the p101 protein is overly active leading to misregulation of gene...
Two identical twins who showed very similar methylation patterns when they were 4 years old show very divergent patterns at age 40. This divergence is most likely due to a different alternative splicing in the two individuals Ob different levels of histone acetyltransferase in the two individuals. Oc environmental differences that they experienced as adults. O d. different genomic imprinting in the two individuals. O e differences in their experiences in utero Suppose that a certain enzyme is synthesized whenever...
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