Which statement is FALSE? Group of answer choices Histones are very conserved at the primary sequence level in eukaryotes. Histones H2A, H2B, and H1 all contain the histone fold domain (HFD). CENPA is most closely related to histone H3. The amino terminal tail of histone H3 is the location of most of its covalent modifications. Amino terminal ends of core histones are involved in internucleosome interactions.

Which statement is FALSE? Group of answer choices Histones are very conserved at the primary sequence level in eukaryotes. Histones H2A, H2B, and H1 all contain the histone fold domain (HFD). CENPA is most closely related to histone H3. The amino terminal tail of histone H3 is the location of most of its covalent modifications. Amino terminal ends of core histones are involved in internucleosome interactions.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter19: Genomes And Proteomes

Section: Chapter Questions

Problem 1ITD: Below is a sequence of 540 bases from a genome. What information would you use to find the...

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Histones are proteins found in eukaryotic cell nuclei, tightly bound to DNA, which has many phosphate groups. The pI of histones is very high,about 10.8. What amino acid residues must be present in relatively large numbers in histones? In what way do these residues contribute to the strong binding of histones to DNA?
To hold bacterial DNA in a more compact configuration, specificproteins must bind to the DNA and stabilize its conformation.Several different proteins are involved in this process. Some of theseproteins, such as H-NS, have been referred as histone-like, due totheir functional similarity to the histone proteins found in eukaryotes.Based on your knowledge of eukaryotic histone proteins, whatbiochemical properties would you expect bacterial histone-likeproteins to have?
"The four core histones are relatively small proteins with a very high proportion of positively charged amino acids; the positive charge helps the histones bind tightly to DNA, regardless of its nucleotide sequence" is true or false.
Below is a sequence of 540 bases from a genome. What information would you use to find the beginnings and ends of open reading frames? How many open reading frames can you find in this sequence? Which open reading frame is likely to represent a protein- coding sequence, and why? Which are probably not functioning protein-coding sequences, and why? Note: for simplicitys sake, analyze only this one strand of the DNA double helix, reading from left to right, so you will only be analyzing three of the six reading frames shown in Figure 19.4.
Given the following diagram of how protein AWESOME1 binds to it's target DNA, describe the potential effects of each of the 5 mutations shown below. The wild-type sequence of a helix #1 is also shown in the blue box, and all the mutations are in helix #1 (see numbers for identifying particular residues). a helix #1 R(1)-V-I-L-Y-F-W-I-M-Y-F-S-H-Y-W-R(16) #1 Predict the consequence of the following mutations: 1) Arg(1) to Glu 2) Arg(1) to Ala 3) Phe(6) to lle 4) Trp(7) to Phe 5) Met(9) to Pro in
Describe the packaging of chromosomal DNA by histones with diagrammatic representations. Name the various histone modifications and describe any two among them.
Within living cells, many different proteins play importantfunctional roles by binding to DNA. Some proteins bind to DNA butnot in a sequence-specific manner. For example, histones are proteinsimportant in the formation of chromosome structure. The positivelycharged histone proteins bind to the negatively charged phosphategroups in DNA. In addition, several other proteins interact with DNAbut do not require a specific nucleotide sequence to carry out theirfunction. For example, DNA polymerase, which catalyzes thesynthesis of new DNA strands, does not bind to DNA in a sequencedependent manner. By comparison, many other proteins do interact with nucleic acids in a sequence-dependent fashion. This means that a specific sequence of bases can provide a structure that isrecognized by a particular protein.Someexamples include transcription factors that affect the rate oftranscription and proteins that bind to origins of replication inbacteria.What information do you know based onthe question…
Within living cells, many different proteins play importantfunctional roles by binding to DNA. Some proteins bind to DNA butnot in a sequence-specific manner. For example, histones are proteinsimportant in the formation of chromosome structure. The positivelycharged histone proteins bind to the negatively charged phosphategroups in DNA. In addition, several other proteins interact with DNAbut do not require a specific nucleotide sequence to carry out theirfunction. For example, DNA polymerase, which catalyzes thesynthesis of new DNA strands, does not bind to DNA in a sequencedependentmanner. By comparison, many other proteins do interactwith nucleic acids in a sequence-dependent fashion. This means that a specific sequence of bases can provide a structure that isrecognized by a particular protein.Someexamples include transcription factors that affect the rate oftranscription and proteins that bind to origins of replication inbacteria.What topic in genetics does this question address?
Within living cells, many different proteins play importantfunctional roles by binding to DNA. Some proteins bind to DNA butnot in a sequence-specific manner. For example, histones are proteinsimportant in the formation of chromosome structure. The positivelycharged histone proteins bind to the negatively charged phosphategroups in DNA. In addition, several other proteins interact with DNAbut do not require a specific nucleotide sequence to carry out theirfunction. For example, DNA polymerase, which catalyzes thesynthesis of new DNA strands, does not bind to DNA in a sequencedependentmanner. By comparison, many other proteins do interactwith nucleic acids in a sequence-dependent fashion. This means thata specific sequence of bases can provide a structure that isrecognized by a particular protein.Someexamples include transcription factors that affect the rate oftranscription and proteins that bind to origins of replication inbacteria. With regard to the three-dimensional structure of…
Histones contain many basic amino acids including lysine. DNA and histones collectively form chromatin. Open chromatin is much more open and accessible to the transcriptional machinery than closed chromatin. Histone lysine acetylation is associated with open chromatin and occurs near genes that are being actively transcribed. Part A Given what you know about the chemical properties of DNA and the function of histones. whv do histones contain so many basic amino acids? Answer in no more than two sentences. Part B Given what you know about how acetylation affects lysine, why does histone lysine acetylation open chromatin? Answer in one sentence only.
Eukaryotic 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?
1. a specific type of histone methyltransferase catalyze the methylation of a single lysine or a single arginine in a histone protein. Draw the structures of methylated lysince and methylated arginine reside. 2. the reversal of histone arginine methylation converts the methyated arginine to citrulline in a reaction that consumes H2). Draw the resulting amino acid residue. What os the pther product of the reaction?