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he DNA site that is bound by a transcriptional activator regulates gene expression in
a) cis
b) trans
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- Post-translational control refers to: a. regulation of gene expression after transcription b. regulation of gene expression after translation c. control of epigenetic activation d. period between transcription and translationA transcriptional activator protein regulates gene expression in a) cisb) transA cell has a mutated mediator protein. a) How will this affect transcription of genes? (circle an answer below) No transcription Weak transcription will occur Strong transcription will occur b) Why? Describe your choice above
- Determine whether the following will increase or decrease gene expression: mRNA degradation mRNA capping Binding of a transcriptional activator Ubiquitination of a protein and targeting to the proteasomeWrite a sentence describing the role of each of the following types of RNA in gene expression. mRNA- rRNA- tRNA- snRNA-An activated eukaryotic transcription factor looks for specific:
- Describe the effects of changing the promoter on the transcription of the DNA strand/gene the promoter ControlsDescribe the effects of transcription factors on gene transcriptionGene Expression: 14) Look at the diagram: a) For each of the molecules in the diagram, identify what type of molecule they are, and label their ends (3',5',N,C). b) For each arrow, name the process and identify the major enzymes involved. c) Where do each of these activities take place in a bacterial cell? In a eukaryotic cell? Draw a picture if it helps you explain it.
- What are the cellular activities that help describe "expression of genetic information"? (Choose all that applies) Replication Transcription C) Translation RegulationHydrogen bonds are important in DNA replication and transcription. They are relatively weak chemical bonds. Why is this a desirable feature for DNA? Describe the effect (s) of changing (mutating) the promoter on the transcription of the DNA strand/gene the promoter controls. What happens to protein synthesis if a nonsense codon is inserted into the gene? Explain why a point mutation does not necessarily change the original amino acid sequence. (Explain silent mutations) Choose any pentapeptide composed of five different amino acids. List the amino acids. Present one messenger RNA codon for each amino acids and the sequence of nucleotides on the DNA that originally coded for your pentapeptide.What is the function of each of the following gene transcription elements? Positive transcription factors RNA polymerase Ribosome mRNA destroyer Transcription factor negative
