Which of the following would prevent transcriptional activators from binding? A. Increased DNA methylation B. Increased...
Which of the following would prevent transcriptional activators from binding?
A. Increased DNA methylation
B. Increased nucleosome abundance
C. BOTH (A) and (B)
D. NEITHER (A) or (B)
Homework Answers
I believe the correct answer to be:
Option C) Both A and B.
Because increased methylation of DNA would not allow polymerase to transcribe the gene and increased nucleosome will mean that the DNA is packed due to which it is not available for other proteins to interact and initiate transcription.
The statement is FALSE as malaria infect the normal shaped red blood cells while sickle cell which is caused by a recessive trait will change the shape of the red blood cell due to which malaria would not be able to infect the RBCs anymore giving the individual with sickle cell resistance towards the malaria.
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Which of the following would prevent transcriptional activators
from binding?
A. Increased DNA methylation
B. Increased...
Which does not affect gene expression at the post-transcriptional level? Choose one: O A. DNA methylation...
Which does not affect gene expression at the post-transcriptional level? Choose one: O A. DNA methylation O B. small interfering RNAs O C. microRNAs O D. nucleotide sequences in the untranslated regions of an mRNA
selecr all that apply QUESTION 12 Which of the following could be considered post transcriptional modification...
selecr all that apply
QUESTION 12 Which of the following could be considered post transcriptional modification in eukaryotes? Select all that apo a. Binding of a sigma factor to the promoter b. Binding of transcription factors to the DNA c. Activators binding to enhancers in the DNA d. Addition of the poly-a tail e. RNA splicing
Nucleosome positioning along the DNA can influence where transcriptional regulatory proteins are able to bind DNA....
Nucleosome positioning along the DNA can influence where transcriptional regulatory proteins are able to bind DNA. If a nucleosome is bound to an enhancer sequence, it may outcompete a regulatory protein from binding the same sequence. Conversely, if an enhancer sequence is in the linker DNA where the nucleosome is absent, the regulatory protein does not have to compete with the nucleosome. The position of the nucleosome can alter the accessibility of a sequence of DNA to DNA binding proteins....
In eukaryotic genomes, regions of _____________________ are transcriptionally active while regions of ____________________ are transcriptionally silent....
In eukaryotic genomes, regions of _____________________ are transcriptionally active while regions of ____________________ are transcriptionally silent. A) Heterochromatin; euchromatin B) Euchromatin; heterochromatin C) None of the above Which of the following proteins can regulate eukaryotic gene expression WITHOUT binding to the DNA in the regulatory region? A) repressors B) enhancers C) co-activators D) transcription factors In eukaryotes, transcriptional activity can be regulated by methylation of a dinucleotide sequence called "CpG." This modification occurs at a: A) Adenine B) Cytosine C)...
Which of the following is not true of DNA methylation? A.The methyl group is attached via...
Which of the following is not true of DNA methylation? A.The methyl group is attached via a strong carbon-carbon bond B.It is heritable across cell division C. t is considered stable enough to mediate X-inactivation D. It interferes with cytosine-guanine binding
AS Part A Which of the following events occurs during DNA replication? All methylation of the...
AS Part A Which of the following events occurs during DNA replication? All methylation of the DNA is lost at the first round of replication Methylated DNA is copied in the cytoplasm, and unmethylated DNA is copied in the nucleus Methylation of the DNA is maintained because DNA polymerase directly incorporates methylated nucleotides into the new strand opposite any methylated nucleotides in the template. Methylation of the DNA is maintained because methylation enzymes act at DNA sites where ane strand...
Gene A is regulated by DNA binding transcription factors encoded by genes B, C, and D....
Gene A is regulated by DNA binding transcription factors
encoded by genes B, C, and D. Genes B and C encode transcriptional
repressors and gene D encodes a transcriptional activator.
1) Diagram what the expression pattern of gene A would
be:
a) in embryos that are homozygous for a null mutation in gene
B.
b) in embryos that are homozygous for a null mutation in gene
C.
c) in embryos that are homozygous for a null mutation in gene
D.
Question 1 Which of the following statements is true? Promoter bashing can lead to increased DNA...
Question 1 Which of the following statements is true? Promoter bashing can lead to increased DNA methylation. Methyl groups are removed from the DNA by DNA methyltransferase. ODNA methylation is directly passed on during meisos to all daughter cells. Monoallelic gene expression occurs when a mutation results in dominant gene expression. Patterns of DNA methylation are preserved in somatic cells following mitosis.
Which of the following correctly describes eukaryotic transcriptional control? a. A transcription factor is a...
Which of the following correctly describes eukaryotic transcriptional control? a. A transcription factor is a DNA molecule that helps RNA polymerase to bind to the enhancer of a specific gene. b. An enhancer is a protein that encourages gene expression by binding to the DNA. c. The promoter is the region of RNA where DNA polymerase will bind to begin transcription. d. The interaction of multiple transcription factors may be required in order to transcribe a...
ton is not an energy dependent process in (B)) Falls eukaryotes 43. Histone methylation is associated...
ton is not an energy dependent process in (B)) Falls eukaryotes 43. Histone methylation is associated with Falls gene activation gene silencing Following histones are required during transcription (A) H2A and 2B (B) H3 (C) H4 (D) All of the above (E) H2AZ (c) induction (D) All of the above (E) None of the above 35. 4. DNA methylation silences gene expression AD True (B) Fall Leucine residues in lucine zipper proteins provides h ydrophobic interaction for dimerization (A) True...
Which does not affect gene expression at the post-transcriptional level? Choose one: O A. DNA methylation O B. small interfering RNAs O C. microRNAs O D. nucleotide sequences in the untranslated regions of an mRNA
selecr all that apply
QUESTION 12 Which of the following could be considered post transcriptional modification in eukaryotes? Select all that apo a. Binding of a sigma factor to the promoter b. Binding of transcription factors to the DNA c. Activators binding to enhancers in the DNA d. Addition of the poly-a tail e. RNA splicing
AS Part A Which of the following events occurs during DNA replication? All methylation of the DNA is lost at the first round of replication Methylated DNA is copied in the cytoplasm, and unmethylated DNA is copied in the nucleus Methylation of the DNA is maintained because DNA polymerase directly incorporates methylated nucleotides into the new strand opposite any methylated nucleotides in the template. Methylation of the DNA is maintained because methylation enzymes act at DNA sites where ane strand...
Gene A is regulated by DNA binding transcription factors
encoded by genes B, C, and D. Genes B and C encode transcriptional
repressors and gene D encodes a transcriptional activator.
1) Diagram what the expression pattern of gene A would
be:
a) in embryos that are homozygous for a null mutation in gene
B.
b) in embryos that are homozygous for a null mutation in gene
C.
c) in embryos that are homozygous for a null mutation in gene
D.
Question 1 Which of the following statements is true? Promoter bashing can lead to increased DNA methylation. Methyl groups are removed from the DNA by DNA methyltransferase. ODNA methylation is directly passed on during meisos to all daughter cells. Monoallelic gene expression occurs when a mutation results in dominant gene expression. Patterns of DNA methylation are preserved in somatic cells following mitosis.
ton is not an energy dependent process in (B)) Falls eukaryotes 43. Histone methylation is associated with Falls gene activation gene silencing Following histones are required during transcription (A) H2A and 2B (B) H3 (C) H4 (D) All of the above (E) H2AZ (c) induction (D) All of the above (E) None of the above 35. 4. DNA methylation silences gene expression AD True (B) Fall Leucine residues in lucine zipper proteins provides h ydrophobic interaction for dimerization (A) True...
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