Homework Answers
D. Binding to a variety of different -10 and -35 sequences.
Sigma factor is a protein that are responsible for binding of RNA polymerase to consensus sequences on DNA ( gene promoters)and are necessary for initiation phase of transcription.
A promotor is located before the -35 and -10 consensus sequences and transcription takes place closer to the promotor region attached with consensus sequences.
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Various sigma factors play a role in gene expression by Choose one: A. allowing for binding...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dyst...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dystrophin. The dystrophin protein itself is 3684 amino acids in length. Calculate below the approximate size of the mRNA that encodes dystrophin. Approximately what percentage of the gene that encodes dystrophin is intron sequence? The human genome encodes a much greater variety and number of proteins than the...
Notice that the genes for lysogeny are clustered in an operon on the "left" side of...
Notice that the genes for lysogeny are clustered in an operon on
the "left" side of the phage plasmid, while the genes for lysis are
clustered in an operon on the "right" side of the plasmid.
At the beginning of each infection, transcription begins at two
"early" promoters.
"Leftward" genes
Early promoter PLcontrols leftward
transcription of early genes, beginning with the N gene.
The N protein plays an anti-termination role in transcription from
PL. Leftward transcription is also enhanced by...
10. 10. When considering regulation of gene expression A. miRNA/RISC complex binding will lead to degradation...
10.
10. When considering regulation of gene expression A. miRNA/RISC complex binding will lead to degradation of target mRNA. B. siRNA/RISC complex binding will halt translation of the target mRNA. C. proteins are destroyed by the proteasome using GTP energy D. labeling of proteins for destruction by the proteasome requires ATP energy 11. When comparing the epigenomes of normal and cancerous breast epithelial cells A. cancerous cells increase the methylation of genes that promote cell growth. B. cancerous cells increase...
45. Which is the factor(s) involved in the regulation of gene activity? Select one: O a....
45. Which is the factor(s) involved in the regulation of gene activity? Select one: O a. Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions. O b. SAM binding to a riboswitch mRNA. O c. Alterations in mRNA conformations by SAM during the transcription. O d. All of these. O e. None of these. 13. The ring is built onto ribose-5-phosphate of PRPP for its de-novo nucleotide biosynthesis, while the ring structure of the bases are synthesized separately and...
Question 1 Match the term with the best definition or description; most topics relate to the...
Question 1 Match the term with the best definition or description; most topics relate to the regulation of gene expression. General type of protein which will increase transcription rates when it attaches to a site A. Factor connected to a particular gene - B. Co-repressor C. Enhancer D. Promoter E. Structural F. Intron G. Activator H. Operator I. Basal transcription J. Glucocorticoid receptor K. Sigma factor L. Mediator M. Inducer N. TATA box O. Repressor The rates of mRNA produced...
1 What is an imprinted gene? Select one: a. A gene that is found on a...
1 What is an imprinted gene? Select one: a. A gene that is found on a Barr body b. A gene that is silenced upon inheritance from a designated parent c. A gene that is inherited from only one parent d. A gene that is encoded on only one of the two copies of a chromosome Question 2 Which of the following is NOT a typical characteristic of cancer? Select one: a. Malignant cancers are typically not able to metastasize...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dystrophin. The dystrophin protein itself is 3684 amino acids in length. Calculate below the approximate size of the mRNA that encodes dystrophin. Approximately what percentage of the gene that encodes dystrophin is intron sequence? The human genome encodes a much greater variety and number of proteins than the...
Notice that the genes for lysogeny are clustered in an operon on
the "left" side of the phage plasmid, while the genes for lysis are
clustered in an operon on the "right" side of the plasmid.
At the beginning of each infection, transcription begins at two
"early" promoters.
"Leftward" genes
Early promoter PLcontrols leftward
transcription of early genes, beginning with the N gene.
The N protein plays an anti-termination role in transcription from
PL. Leftward transcription is also enhanced by...
10.
10. When considering regulation of gene expression A. miRNA/RISC complex binding will lead to degradation of target mRNA. B. siRNA/RISC complex binding will halt translation of the target mRNA. C. proteins are destroyed by the proteasome using GTP energy D. labeling of proteins for destruction by the proteasome requires ATP energy 11. When comparing the epigenomes of normal and cancerous breast epithelial cells A. cancerous cells increase the methylation of genes that promote cell growth. B. cancerous cells increase...
45. Which is the factor(s) involved in the regulation of gene activity? Select one: O a. Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions. O b. SAM binding to a riboswitch mRNA. O c. Alterations in mRNA conformations by SAM during the transcription. O d. All of these. O e. None of these. 13. The ring is built onto ribose-5-phosphate of PRPP for its de-novo nucleotide biosynthesis, while the ring structure of the bases are synthesized separately and...
Question 1 Match the term with the best definition or description; most topics relate to the regulation of gene expression. General type of protein which will increase transcription rates when it attaches to a site A. Factor connected to a particular gene - B. Co-repressor C. Enhancer D. Promoter E. Structural F. Intron G. Activator H. Operator I. Basal transcription J. Glucocorticoid receptor K. Sigma factor L. Mediator M. Inducer N. TATA box O. Repressor The rates of mRNA produced...
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