How does histone acetylation change chromatin structure? Group of answer choices 1. Histones lose their positive charge so the negatively charged DNA is more tightly packed 2. Histones lose their positive charge so the negatively charged DNA is less tightly packed 3. Histones lose their negative charge so the positively charged DNA is more tightly packed 4. Histones lose their negative charge so the positively charged DNA is less tightly packed

How does histone acetylation change chromatin structure? Group of answer choices 1. Histones lose their positive charge so the negatively charged DNA is more tightly packed 2. Histones lose their positive charge so the negatively charged DNA is less tightly packed 3. Histones lose their negative charge so the positively charged DNA is more tightly packed 4. Histones lose their negative charge so the positively charged DNA is less tightly packed

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter10: Cell Reproduction

Section: Chapter Questions

Problem 7RQ: Identical copies of chromatin held together by cohesin at the centromere are called.______ histones...

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Which type of chromatin makes dark bands? Does this type usually contain more or less active genes? Group of answer choices 1. Euchromatin; less active genes because the DNA is more tightly packed 2. Heterochromatin; more active genes because DNA is less tightly packed 3. Heterochromatin; less active genes because the DNA is more tightly packed 4. Euchromatin; more active genes because DNA is less tightly packed
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All of the following statements regarding nucleosomes are true EXCEPT A each bead-like structure contains 8 molecules of histones H1, H2A, H2B, H3 and H4 the bead like structures are made up of core histones wrapped around by the DNA strands the histone proteins in the nucleosomes contain positively charged amino acids that interact with the negatively charged DNA D the bead like structures are linked to each other by the DNA chain
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Nucleosomes are the ball-like structures around which the double helix winds. What proteins make up nucleosomes? Group of answer choices hertone histone heterochromatin euchromatin
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.
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THE MOLECULAR GENETICS OF CYSTIC FIBROSIS 2. What is the sequence of bases on the strand of DNA that is complementary to the template strand? 3. What mRNA will be formed from the template strand of DNA? The following is the base sequence of DNA that codes for amino acids 506-510 of the protein that regulates the chlorine channels in the cell membrane. This protein contains a total of 1476 amino acids so this is a small part of the entire gene. DNA Template Strand: TAGTAGAAACCACAA 1. What is the minimum number of DNA nucleotides in this whole gene? 4. What amino acids will this mRNA code for? 5. If the 6th, 7th and 8th bases in the template strand of the DNA are removed, rewrite the new template strand below. 1 6. When the template strand of the DNA is changed, this is referred to as a mutation. What kind of mutation is this? 7. What mRNA will be formed from the mutated template strand of DNA? 8. What amino acids will this new mRNA from the mutated template strand code for? 9. Are these…
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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?
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