Explain how chromatin can affect gene expression in eukaryotes. and transcription is When DNA is methylated, chromatin O Condenses, activated. Relaxes, repressed. Relaxes, activated. Condenses, repressed.
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- Decondensed chromatin, but not condensed chromatin can be remodeled. O is associated with methylation of CpG islands. O is often acetylated. 5 O is packed into nucleosomes.Prophase: Prophase begins the M phase of the cell cycle, the period during which a cell actually divides. In prophase, the nucleolus will disappear and the chromatin will begin to coil into compact, distinct chromosomes. Why might the condensing of chromatin be necessary?Explain how chromatin structure influences gene expression
- Which of the following statements most accurately represent chromatin state and transcription? Group of answer choices 1.Histone deacetylases promote closed chromatin and result in repressed transcription 2.Open chromatin is associated with hypoacetylation and has high levels of transcription 3.Histone acetyltransferases result in hypoacetylation and high levels of transcription 4.Hyperacetylation is associated with closed chromatin and low levels of transcriptionReproduction of the DNA occurs during (????) of the cell cycle. M Phase G1 Phase G2 Phase S Phase G0 Phase What are the mRNA base triplets that correspond to a specific amino acid called? Ribocodes Triskellions Modules CodonsDescribe the differences between normal vs cancer cells as shown below: Nucleus Nucleolus Cell, membrance Cytoplasm Chromatin Strain artifact Normal cell Chromatin clumps, Nucleus Cytoplasm Nucleolus Cancer cell
- The 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.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…Mitosis: Sequencing Cells in Various Stages of Mitosis What is the order of the cells to show the correct sequence of stages in mitosis? В. E. O BEADC O EADCB O DEABC O CDAEB
- METAPHASE OF ONION ROOT CELL (PLANT CELL) describe the appearance of DNA, spindle fibers and location of the chromosomes please describe the appearance and location, do not state the process do not copy from google please// Which one of these does CDK1/cyclin mitotic kinase NOT do to induce mitosis? Phosphorylates Histone H1 to condense chromosomes Phosphorylates pore proteins to disassemble pores Phosphorylates transcription factors to shut off transcription Phosphorylates lamins for lamin assemblyYou add a chemical to a cell that prevents all of the chromatin from uncoiling so that the chromosomes remain highly coiled, even after the completion of mitosis. If you add a transcription factor that triggers the transcription of mRNA for the protein Pitx in this situation what would happen. Group of answer choices A)All transcription of Pitx is stopped by the transcription factor B)Nothing because the Pitx gene is already being transcribed at the maximum ratea C)Nothing, because the Pitx gene cannot be transcribed in this highly coild state D)The amount of transcription of Pitx is greatly increasedt