Homework Answers
DNA is associated with proteins to form Chromatin. The proteins are histones. They are present only in eukaryotes.
A nucleosome is composed of DNA wrapped around an octamer of histone proteins. It is a fundamental subunit of chromatin.
An activator can increase transcription by attracting a transcription factor to the region. Transcription factors are involved in initiation and regulation of transcription genes.
Addition of (-COCH3) groups to histone amino terminal tails result in an increase in gene expression as the chromatin relaxes and becomes more accessible for transcription.
Removal of acetyl groups from histones result in a decrease in gene expression as deacetylation results in condensation of the chromatin.
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Identify the most accurate term related to chromatin remodeling. DNA is associated with proteins to form....
which if the following best describes the mechanism by which chromatin remodeling complexes loosen the dna...
which if the following best describes the mechanism by which chromatin remodeling complexes loosen the dna wrapped around the core histones A) they chemical lie modify the DNa changing the affinity between the histones octaves and the DNA B) they use energy derived from ATP hydrolysis to change the relative position of the Dan and the core histone octamer C) they remove histone H1 from the linker DNA adjacent to the core histone octamer
The following sentences describe chromatin structure and how altering chromatin structure can affect gene expression. Complete...
The following sentences describe chromatin structure and how altering chromatin structure can affect gene expression. Complete each sentence using the words provided.In some cells, DNA combines with proteins to form a substance calledThe lowest level of chromatin structure consists of DNA wrapped twice around a group of histones to form a(n)The formation of nucleosomes may block the binding of transcription factors and RNA polymerase II to theThe structure of chromatin can be modified by altering either the DNA or the...
more then one is correct QUESTION General name/ group/class of proteins that bind DNA and bind...
more then one is correct
QUESTION General name/ group/class of proteins that bind DNA and bind proteins such as chromatin remodeling complex or histone modifying enzyme 1. General transcription factors 2 chromatin remodeling complex D3. histone chaperone D 4 gene activator protein S.RNA polymerase II 6 histone modifying ensyme
Chromatin remodeling enzyme complexes ______. Choose all that apply. Group of answer choices: 1.cause DNA to...
Chromatin remodeling enzyme complexes ______. Choose all that apply. Group of answer choices: 1.cause DNA to be repositioned for access or tighter packing. 2.are non-histone proteins that can bind to the chromatin in interphase nucleus. 3.promote the transition from the 30nm fibre to the 11nm fibre. 4.are essential for regulating gene expression. 5.are able to bind to the chromatin structure anywhere and cause DNA within a nucleosome to be repositioned. 6.bind to chromatin by binding to chemical modifications in the...
Match the term with the process it is involved in. 1. Chromatin remodeling 2. Prokaryotic gene...
Match the term with the process it is involved in. 1. Chromatin remodeling 2. Prokaryotic gene expression Polycistronic mRNA > 3. Promotion of expression of gene Histone de-acetylase 4. DNA binding proteins 5. DNA methylation 6. Semi-conservative replication
3. Which of the following is not a good example of a housekeeping protein in eukaryotic...
3. Which of the following is not a good example of a housekeeping protein in eukaryotic cells? a)DNA polymerase b)histones c)RNA polymerase 4)hemoglobin Explanation: 4. Which of the following statements about histones is true? a. Histones activate transcription when bound to the promoter, b. Although RNA polymerase can access DNA packed around histones, the general transcription factors and transcriptional regulators cannot. c. Histone acetyltransferases affect transcription by adding acetyl groups to histones and altering chromatin structure to allow accessibility to...
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...
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...
Abstract #1 Histone H3 phosphorylation near the nucleosome dyad alters chromatin structure. Nucleosomes contain ∼146 bp...
Abstract #1 Histone H3 phosphorylation near the nucleosome dyad alters chromatin structure. Nucleosomes contain ∼146 bp of DNA wrapped around a histone protein octamer that controls DNA accessibility to transcription and repair complexes. Posttranslational modification (PTM) of histone proteins regulates nucleosome function. To date, only modest changes in nucleosome structure have been directly attributed to histone PTMs. Histone residue H3(T118) is located near the nucleosome dyad and can be phosphorylated. This PTM destabilizes nucleosomes and is implicated in the regulation...
thank you!! Question 1 0.5 pts It has been shown that inhibition of a key chromatin...
thank you!!
Question 1 0.5 pts It has been shown that inhibition of a key chromatin remodeling complex known as NURD. by deleting one of its subunits, can result in a significant increase in the efficiency of reprogramming of somatic cells into pluripotent stem cells. The reprogramming is normally done by the induced expression of a battery of transcription factors in the somatic cells, but is typically not very efficient. Such an observation suggests that the NURD complex is normally...
The following sentences describe chromatin structure and how altering chromatin structure can affect gene expression. Complete each sentence using the words provided.In some cells, DNA combines with proteins to form a substance calledThe lowest level of chromatin structure consists of DNA wrapped twice around a group of histones to form a(n)The formation of nucleosomes may block the binding of transcription factors and RNA polymerase II to theThe structure of chromatin can be modified by altering either the DNA or the...
more then one is correct
QUESTION General name/ group/class of proteins that bind DNA and bind proteins such as chromatin remodeling complex or histone modifying enzyme 1. General transcription factors 2 chromatin remodeling complex D3. histone chaperone D 4 gene activator protein S.RNA polymerase II 6 histone modifying ensyme
Match the term with the process it is involved in. 1. Chromatin remodeling 2. Prokaryotic gene expression Polycistronic mRNA > 3. Promotion of expression of gene Histone de-acetylase 4. DNA binding proteins 5. DNA methylation 6. Semi-conservative replication
3. Which of the following is not a good example of a housekeeping protein in eukaryotic cells? a)DNA polymerase b)histones c)RNA polymerase 4)hemoglobin Explanation: 4. Which of the following statements about histones is true? a. Histones activate transcription when bound to the promoter, b. Although RNA polymerase can access DNA packed around histones, the general transcription factors and transcriptional regulators cannot. c. Histone acetyltransferases affect transcription by adding acetyl groups to histones and altering chromatin structure to allow accessibility to...
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...
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...
thank you!!
Question 1 0.5 pts It has been shown that inhibition of a key chromatin remodeling complex known as NURD. by deleting one of its subunits, can result in a significant increase in the efficiency of reprogramming of somatic cells into pluripotent stem cells. The reprogramming is normally done by the induced expression of a battery of transcription factors in the somatic cells, but is typically not very efficient. Such an observation suggests that the NURD complex is normally...
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