Histones are: Group of answer choices Are present in eukaryotic, but not prokaryotic chromosomes All of these are true Have tails that can be modified and thereby change how actively a gene is transcribed Generally positively charged Are the protein components of nucleosomes
Q: Which of the following statements correctly describes the structure of chromatin around the promoter…
A: Chromatin is a complex of DNA and protein found in eukaryotic cells.
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A: Given gene sequence: Met-Lys-Ser-Pro-Ala-Thr-Pro the gene then produces a protein with the amino…
Q: Which of the following explains why prokaryotes have a bigger gene-to-genome size ratio compared to…
A: *prokaryotic genome is composed of single or double stranded DNA molecule form of circle. The…
Q: Which statement is FALSE? Group of answer choices Histones are very conserved at the primary…
A: 2nd statementis false. H1 doesn't contain histone fold domain. H2A, H2B, H3 and H4 have HFD
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A: Transcription is the process which is responsible for synthesizing the mRNA from the DNA by the…
Q: Translocation of a proto-oncogene to a chromosome region with reduced methylation increases its…
A: Abnormal sequences of DNA methylation, disturbed patterns of histone posttranslational modifications…
Q: A eukaryotic gene contains 14 exons. Most of the transcripts from this gene contain all 14 exons,…
A: Introduction : Different combinations of exons of same gene when combined and produce different…
Q: Which of the following is not a control of gene transcription? O The repression of a gene by the…
A: The transcription is the process by which RNA is produced from the DNA template by different…
Q: True or false If cells were treated with a weak base such as ammonia or chloroquine, which raises…
A: False
Q: to that in humans. The molecule that is most similar in function to the bicoid and the molecule that…
A: Introduction Transcription is a process in central dogma where the DNA strand is transcribed into a…
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A: Genes or DNA are generally coiled and held together by the help of structural proteins called…
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A: Any alteration occurring in the DNA sequence of an organism is known as mutation.
Q: Please choose the correct answer. The transcriptional complement of the DNA strand with the code 3’…
A: Transcription is the process in which DNA is copied to RNA. Translation is the process of making…
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A: Answer is option A.
Q: In studies on chromatin it has been reported that DNA that is being actively transcribed is more…
A: DNA- “deoxyribonucleic acid” is a complex structure that carries the unique genetic code of every…
Q: Imagine you are going to label a gene associated with apoptosis in Symbiodiniaceae with a Yellow…
A: Splicing is the post transcriptional modification where intron (non coding part of gene) will be…
Q: Which of the followings best describes the histone mRNA structure? histone mRNAs end in a…
A: A histone is a protein that provides structural support to a chromosome. In order for very long DNA…
Q: Which of the following is likely to be transcriptionally expressed? euchromatin and DNA with…
A: Introduction: Two main stages are there at which gene is expressed: transcription and translation.…
Q: How does chemical modification of the histones lead to changes in chromatin structure? Choose all…
A: Chromatin It refers to the complex of DNA and proteins that forms chromosomes in the nucleus of…
Q: Name the 5 types of histones, Which form the nucleosome core and which histone holds the nucleosome…
A: Histones are protein biomolecules that are responsible for stabilizing and condensing the DNA of…
Q: Epigenetic changes in gene regulation are caused by ________. missing nucleotides or chromosomes…
A: Epigenetic Epigenetic is a reversible change in the DNA which controls the expression of genes.
Q: Which of the following statements about the attempt to express a eukaryotic gene in bacteria is…
A: The regulation of gene expression in eukaryotes occurs at several level, which is far more diverse…
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A: Introduction: A nucleotide is an organic molecule that is the building block of DNA and RNA. They…
Q: Which of the following is not a general description of the gene expression regulation mechanisms…
A: Gene expression regulation mechanisms helps to maintain the rate of gene expression or to regulate…
Q: researcher has identified a mutant strain of yeast whose histones are unable to be acetylated. Which…
A: Histone acetylation and deacetylation are the processes by which the lysine residues within the…
Q: Match each of the following eukaryotic gene regulatory mechanisms or component to it's best…
A: Long strands of DNA wrap around an octamer of regulatory proteins known as histones: H2A, H2B, H3,…
Q: Proteins A,B,C, and D in the diagram are encoded by different genes and interact with each other.…
A: Answer. There are many different types of mutations that can occur in a coding sequence that can…
Q: Which of the following statements about methylation and acetylation is correct? A. Genes that have…
A: Introduction Deacetylation is the removal of an acetyl group and occurs on a plethora of targets and…
Q: There are five major types of histones in eukaryotic cells. One of these is not part of the…
A: The nucleosome is the fundamental subunit of chromatin. The nucleosome is composed of two turns of…
Q: Which one of the following statements about nucleosomes is false? a) The DNA double helix wraps…
A: Introduction Nucleosomes are eukaryotic chromatin's basic repeating structural units, comprised of…
Q: fill in the blank When the cell goes from M to GI, the number of nucleosomes on this stretch of DNA…
A: The cell cycle is a cyclic process where new cells are formed, increase in size, and enters…
Q: In humans, the average length of a gene on chromosome 7 is 69,000 base pairs, but the average mRNA…
A: DNA( deoxyribonucleic acid) is the double-stranded molecule that is the genetic material in most…
Q: The nucleosomal core in eukaryotes consists of all of the following histone proteins except:…
A: NUCLEOSOMES It is a section of DNA that is wrapped around a core of proteins termed as Histone…
Q: 1. Two closely related species may have a very similar genome size but very different number of…
A:
Q: Fruit flies with DNA transposons known as P elements are known to have 1.gene silencing factors in…
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Q: There are several different types of genes within a genome that serve specific functions within the…
A: A genome is an organism's full set of genetic information. It contains all of the information that…
Q: What mechanisms are involved in polynucleotide folding which produces a stable molecule that can fit…
A: A gene is a sequence of DNAs that codes for RNAs with the help of regulatory elements. The RNA is…
Q: Which exons are present or absent in the spliced mRNA transcripts for each sex? Male Female A C D A…
A: Splicing or RNA (ribonucleic acid) splicing refers to the kind of RNA processing that transforms a…
Q: Please put the following steps of eukaryotic protein synthesis in order from first (1) to last (4)…
A: The process of gene expression in the cell occurs via the mechanisms of Replication, Transcription,…
Q: If a section of a chromosome is heavily methylated, which of the following is likely to be true?…
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Q: Transcription of protein-coding genes in the eukaryotic nucleus a. produces mature mRNAs. b. is…
A: TRANSCRIPTION:- During the process of gene expression, DNA is first copied into an mRNA molecule…
Q: Which of the following mutations would not convert a proto-oncogene into an oncogene? A…
A: There are about three genetic mechanisms which play role in activating the oncogenes in human…
Q: Since eukaryotic chromosomes are assembled with histone proteins, how are replication and…
A: Eukaryotes are the organisms that contain a nuclear membrane covering the nucleus. But the…
Q: Which structure in the eukaryotic chromosome is about 700-840 nm in diameter, contains scaffold…
A: One solenoid is composed of 6 nucleosomes. It is defined as a packaging material of DNA and is a…
Q: siRNAs and miRNAs are produced by: Group of answer choices The cutting and processing of…
A: siRNA are dsRNA which are exogenous in nature while miRNA are endogenous ssRNA.
Q: Spliceosomes include all of the following EXCEPT enzymes catalyzing acetylation of histone…
A: Introduction: The splicing of RNA occurs by a large complex known as the spliceosome. It contains…
Q: Which structure in the eukaryotic chromosome is about 2 nm in diameter, contains no histone proteins…
A: Transcription is the cycle by which the data in a strand of DNA is duplicated into another molecule…
Histones are:
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- Which of the following statement is true about histone deacetylase? It enables RNA polymerase to bind to the DNA O It is rarely found near the centromere and telomeres of chromosomes O It is frequently associated with euchromatin O It is an enzyme that modifies the lysine residue of histone tailsHeterochromatin and Euchromatin Have Which Different Histone modificationsEukaryotic Genetic Sequence: 5'-TAC CAT GAT CCC TAT - 3' 1. What would be the newly synthesized DNA strand and explain how the strand will be replicated. Where in the cell would this occur? 2. What would be the synthesized mRNA strand, and how is it transcribed from the original DNA strand, and then converted from a pre-mRNA strand to a mature mRNA? Where in the cell does this occur? 3. What would be the anti-codons for the tRNA. What are the amino acids generated based on the RNA. How are these amino acids translated into protein and where in the cell does this happen?
- I. The retinoic acid receptor (RAR) is a transcription factor that is similar to steroid hormone receptors. Thesubstance (ligand) that binds to this receptor is retinoicacid. One of the genes whose transcription is activatedby retinoic acid binding to the receptor is myoD. Thediagram that follows shows a schematic view of theRAR proteins produced by genes into which one oftwo different 12-base double-stranded oligonucleotides had been inserted in the ORF. The insertion site(a–m) associated with each mutant protein is indicatedwith the appropriate letter on the polypeptide map.For constructs encoding proteins a–e, oligonucleotide 1(5′ TTAATTAATTAA 3′ read off either strand) wasinserted into the RAR gene. For constructs encoding proteins f–m, oligonucleotide 2 (5′ CCGGCCGGCCGG 3′)was inserted into the gene.NH2 f g h i j k l m COOHa b c d eThe wild-type RAR protein can both bind DNA and activate transcription weakly in the absence of retinoic acid(RA) and strongly in RA’s presence. Each…Hyperacetylation of histone tails is often associated with: Question 22 options: Tight conformation of chromatin Loose conformation of chromatinGive at least one example of a chromosomal structureor function affected by the following mechanisms formodulating chromatin structure:a. Posttranslational changes of the normal histonesfound in the nucleosome
- Which of the following is likely to be transcriptionally expressed? euchromatin and DNA with methyl groups euchromatin DNA with methyl groups DNA with acetylated histones euchromatin and DNA with acetylated histonesThe diagram below shows the structure of DNA from the level of a gene to a condensed mitotic chromosome. At each of the four locations marked, indicate how a gene may be regulated by selecting from the choices given. Some answer choices may fit into more than one position; however, you should use each answer choice only once. Choices given: Alternative splicing within the gene sequence can lead to different forms of mRNA. A promoter region can be blocked by another protein. Histone deacetylation can prevent DNA from unwinding. A regulatory region can be bound and increase transcription rates.Lactose intolerant individuals do not produce the enzyme lactase. Studies show that the gene that encodes lactase is not transcribed. This gene is most likely associated with nucleosomes that are ______________ which can be caused by histone Uncondensed; acetylation Uncondensed; deacetylation Condensed; acetylation Condensed; deacetylation Uncondensed; methylation
- The tumor suppressor pRB also binds to and suppresses theactivity of retinoblastoma binding protein 2 (RBP2), ahistone demethylase that removes methyl groups from diand trimethylated lysines in histone 3. What is the possibleconsequence of an inactivating mutation in RB1 that causesan inability of pRB to bind RBP2?Compared to heterochromatin, euchromatin is comprised of densely packed nucleosomes and with higher transcription activity comprised of densely packed nucleosomes and with lower transcription activity O comprised of loosely packed nucleosomes and with lower transcription activity Ocomprised of loosely packed nucleosomes and with higher transcription activityDescribe in general terms the histone code hypothesis