In its active form it turns of gene expression. a.) Transcriptional repressor b.) Transcriptional activator c.)...
In its active form it turns of gene expression.
a.) Transcriptional repressor
b.) Transcriptional activator
c.) miRNA
d.) tRNA
e.) terminator
Homework Answers
Transcriptional repressor
Repressors are proteins which bind to DNA sequences called as insulators or silencer and turn off gene expression.
Activators are proteins which bind to DNA sequences called as enhancers and turn on gene expression.
Transfer RNA is involved in translation. It carries anti codon and amino acid which is to be added in the growing peptide chain. This is not involved in the regulation of gene expression.
Terminator is a DNA sequence which binds to proteins that stop the transcription of messenger RNA.
miRNA is micro RNA which is involved in degradation of foreign genes entering a cell.
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In its active form it turns of gene expression.
a.) Transcriptional repressor
b.) Transcriptional activator
c.)...
Which is the factor(s) involved in the regulation of gene activity? Select one: a. Transcriptional repressor/activator...
Which is the factor(s) involved in the regulation of gene activity? Select one: a. Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions. b. SAM binding to a riboswitch mRNA. c. Alterations in mRNA conformations by SAM during the transcription. d. All of these. e. None of these.
3. NF-kB is a transcriptional activator. In its active form, it binds to DNA and helps...
3. NF-kB is a transcriptional activator. In its active form, it binds to DNA and helps to activate expression of many genes, including B-interferon. In terms of what you know about enhancers and enhanceosomes, explain why active NF-kB by itself is unable to cause B-interferon to be expressed.
TRANSCRIPTIONAL CONTROL OF GENE EXPRESSION CAN INVOLVE A. BINDING OF HORMONE-RECEPTOR COMPLEXES TO ENHANCERS B. REPRESSOR-MRNA...
TRANSCRIPTIONAL CONTROL OF GENE EXPRESSION CAN INVOLVE A. BINDING OF HORMONE-RECEPTOR COMPLEXES TO ENHANCERS B. REPRESSOR-MRNA BINDING C. EXON MUTATIONS D. ALTERNATIVE POLYADENYLATION AND SPLICING PATHWAYS
Which of the following statements is correct concerning operon gene control? Positive control requires an activator...
Which of the following statements is correct concerning operon gene control? Positive control requires an activator protein to stimulate transcription of the structural genes within an operon. In negative control, a repressor protein inhibits or turns off transcription of the structural genes within the operon. An inducible operon normally is not transcribed. It requires an inducer molecule to stimulate transcription either by inactivating a repressor protein in a negative inducible operon or by stimulating the activator protein in a positive...
Match each term associated with genes and control of gene expression with the appropriate description. A...
Match each term associated with genes and control of gene expression with the appropriate description. A transcriptional unit" that consists of promoter multiple genes under the control of a single regulatory element. A transcriptional regulatory protein (prokaryotic or eukaryotic) which works by turning on or increasing gene transcription. activator The region of a gene to which RNA polymerase binds. Enhancer A transcriptional regulatory protein prokaryotic or eukaryotic) which works by turning off or decreasing gene transcription. repressor A molecule that...
A) An Operon is:? 1- A gene that affect another gene transcription. 2. A gene coding...
A) An Operon is:? 1- A gene that affect another gene transcription. 2. A gene coding for a metabolic pathway. 3. A protein that blockgene expression. 4. A set of genes under the control of one promoter. B )- In bacteria the Lac Operon genes code for proteins that break down.? 1- Arabinose 2- Lactose 3- Galactose 4- Glucose C )mRNA processing involves removal of .......? 1- Introns 2- The poly-A tail 3- The 5' cap 4- Exons D )...
Consider what you know about the lac operon, and predict whether the repressor and the activator...
Consider what you know about the lac operon, and predict whether the repressor and the activator is active (able to bind to DNA) or inactive (unable to bind to DNA), and the level of transcription in the following scenarios. Options for transcription levels include high, medium, leaky and off. a. When lactose is present but glucose is not, the repressor is and the activator is leading to levels of transcription. and the activator is b. When lactose and glucose are...
Gene A is regulated by DNA binding transcription factors encoded by genes B, C, and D....
Gene A is regulated by DNA binding transcription factors
encoded by genes B, C, and D. Genes B and C encode transcriptional
repressors and gene D encodes a transcriptional activator.
1) Diagram what the expression pattern of gene A would
be:
a) in embryos that are homozygous for a null mutation in gene
B.
b) in embryos that are homozygous for a null mutation in gene
C.
c) in embryos that are homozygous for a null mutation in gene
D.
Question 1 2 pts The expression of certain bacterial genes is regulated. Match each term with...
Question 1 2 pts The expression of certain bacterial genes is regulated. Match each term with the correct definition This is a small molecule that binds a repressor protein, causing the protein to change from an inactive form to an active form. I Choose ] Regulatory gene Promoter Terminator Structural gene Repressor protein Operator Inducer Corepressor This is a specific nucleotide sequen that a repressor protein binds to This is a specific nucleotide sequence Choose where RNA polymerase begins transcription...
C . Give the specific that explain how hormones controls control gene expression in e O...
C . Give the specific that explain how hormones controls control gene expression in e O 32. Define Epigenetic Oby. 33. This is a hypothetical model of interrelated gene circuits is given below. RO operator and SG- structural pene. The Repressor may be a inactiverective regressor and the effector may be an of interrelated gene circuits is given below. RG-regulator gene, OG er or corepressor B ressors B & C at the time of State the effect on structural genes...
3. NF-kB is a transcriptional activator. In its active form, it binds to DNA and helps to activate expression of many genes, including B-interferon. In terms of what you know about enhancers and enhanceosomes, explain why active NF-kB by itself is unable to cause B-interferon to be expressed.
Which of the following statements is correct concerning operon gene control? Positive control requires an activator protein to stimulate transcription of the structural genes within an operon. In negative control, a repressor protein inhibits or turns off transcription of the structural genes within the operon. An inducible operon normally is not transcribed. It requires an inducer molecule to stimulate transcription either by inactivating a repressor protein in a negative inducible operon or by stimulating the activator protein in a positive...
Match each term associated with genes and control of gene expression with the appropriate description. A transcriptional unit" that consists of promoter multiple genes under the control of a single regulatory element. A transcriptional regulatory protein (prokaryotic or eukaryotic) which works by turning on or increasing gene transcription. activator The region of a gene to which RNA polymerase binds. Enhancer A transcriptional regulatory protein prokaryotic or eukaryotic) which works by turning off or decreasing gene transcription. repressor A molecule that...
Consider what you know about the lac operon, and predict whether the repressor and the activator is active (able to bind to DNA) or inactive (unable to bind to DNA), and the level of transcription in the following scenarios. Options for transcription levels include high, medium, leaky and off. a. When lactose is present but glucose is not, the repressor is and the activator is leading to levels of transcription. and the activator is b. When lactose and glucose are...
Gene A is regulated by DNA binding transcription factors
encoded by genes B, C, and D. Genes B and C encode transcriptional
repressors and gene D encodes a transcriptional activator.
1) Diagram what the expression pattern of gene A would
be:
a) in embryos that are homozygous for a null mutation in gene
B.
b) in embryos that are homozygous for a null mutation in gene
C.
c) in embryos that are homozygous for a null mutation in gene
D.
Question 1 2 pts The expression of certain bacterial genes is regulated. Match each term with the correct definition This is a small molecule that binds a repressor protein, causing the protein to change from an inactive form to an active form. I Choose ] Regulatory gene Promoter Terminator Structural gene Repressor protein Operator Inducer Corepressor This is a specific nucleotide sequen that a repressor protein binds to This is a specific nucleotide sequence Choose where RNA polymerase begins transcription...
C . Give the specific that explain how hormones controls control gene expression in e O 32. Define Epigenetic Oby. 33. This is a hypothetical model of interrelated gene circuits is given below. RO operator and SG- structural pene. The Repressor may be a inactiverective regressor and the effector may be an of interrelated gene circuits is given below. RG-regulator gene, OG er or corepressor B ressors B & C at the time of State the effect on structural genes...
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