24: Epigenetic Mechanisms Quizellenjmchenry2020-04-03T12:37:39-04:00 Please sign up for the course before taking this quiz. The DNA in the nucleus contains every bit of information that any cell will ever need for the entire lifetime of the organism.1 True False How many histones come together to make the nucleosome?1 8 4 12 2 The “switches” on nucleosomes (histone spools) can be activated by all of these molecules EXCEPT:1 Methyl (CH3) Acetyl (COCH3) Phosphate (PO4) DNA polymerase What is the “methyl” group?1 COOH CH3-R CH3 CH4 Genes can be made up of many different DNA sections that are spread out and must be spliced together.1 True False What do nucleosomes/histones help to do?1 Keep DNA organized. "Spell check" replicated DNA for errors. Replicate DNA. Translate proteins. When a gene is being used and being transcribed, we say it is being _______________.1 expressed modified silenced exposed What does “epi-genetics” roughly mean?1 "within the genes" "outside of the genes" "before genes" "without/no genes" What does methylation do to DNA?1 Destroys "junk" DNA. Opens DNA strands to promote DNA transcription. Replicates it. Keeps the DNA strands closed so they cannot be transcribed. MicroRNAs or miRNAs help to regulate gene expression by1 "cutting" up pieces of mRNA into little fragments so that they cannot be translated. helping DNA polymerase to bind to DNA for gene transcription, therefore "upregulating" the gene. binding to mRNA that shouldn't be translated by a ribosome, therefore blocking the product of the gene. binding to DNA polymerase and preventing it from binding to DNA strands, therefore "silencing" the gene. 23: Mitosis (and DNA replication) Final Exam: lessons 1-24 Back to: 24: Epigenetic Mechanisms
Please sign up for the course before taking this quiz. The DNA in the nucleus contains every bit of information that any cell will ever need for the entire lifetime of the organism.1 True False How many histones come together to make the nucleosome?1 8 4 12 2 The “switches” on nucleosomes (histone spools) can be activated by all of these molecules EXCEPT:1 Methyl (CH3) Acetyl (COCH3) Phosphate (PO4) DNA polymerase What is the “methyl” group?1 COOH CH3-R CH3 CH4 Genes can be made up of many different DNA sections that are spread out and must be spliced together.1 True False What do nucleosomes/histones help to do?1 Keep DNA organized. "Spell check" replicated DNA for errors. Replicate DNA. Translate proteins. When a gene is being used and being transcribed, we say it is being _______________.1 expressed modified silenced exposed What does “epi-genetics” roughly mean?1 "within the genes" "outside of the genes" "before genes" "without/no genes" What does methylation do to DNA?1 Destroys "junk" DNA. Opens DNA strands to promote DNA transcription. Replicates it. Keeps the DNA strands closed so they cannot be transcribed. MicroRNAs or miRNAs help to regulate gene expression by1 "cutting" up pieces of mRNA into little fragments so that they cannot be translated. helping DNA polymerase to bind to DNA for gene transcription, therefore "upregulating" the gene. binding to mRNA that shouldn't be translated by a ribosome, therefore blocking the product of the gene. binding to DNA polymerase and preventing it from binding to DNA strands, therefore "silencing" the gene.
