Why is the control of gene expression that is used extensively in oocyte (where the cytoplasm...
Why is the control of gene expression that is used extensively in oocyte (where the cytoplasm stores maternally produced products for use during cleavage stages) selective mRNA translocation.
Homework Answers
Early control of mRNA in occured is dependent on poly A tail modification. Maternal genes play essential and important role during early cleavage stages. Each gene plays a role at a particular developmental stage hence expression of specific genes in oocytes is a necessity.
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Why is the control of gene expression that is used extensively
in oocyte (where the cytoplasm...
What control elements regulate expression of the mPGES-1 gene? The promoter of a gene includes the...
What control elements regulate expression of the mPGES-1 gene? The promoter of a gene includes the DNA immediately upstream of the transcription start site, but expression of the gene can also be affected by control elements. These can be thousands of base pairs upstream of the promoter, grouped in an enhancer. Because the distance and spacing of these control elements make them difficult to identify, scientists begin by deleting sections of DNA that contain possible control elements and measuring the...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change to DNA sequence. B. Alternative splicing. C. Export of mRNA from the nucleus. D. Transcriptional repression. E. Destruction of mRNA Q2) Trans-acting regulators of gene expression include? A. promoters. B. histone deacetylases C. introns D. silencers E. the TATA box. Q3) Gene regulation in eukaryotes often involves which of the following, which are not also used by prokaryotes? A.RNA polymerase B.Transcription factors C.Histone modification...
name TWO mechanisms of control of gene expression that are only used by eukaryotes and discuss...
name TWO mechanisms of control of gene expression that are only used by eukaryotes and discuss why each of those mechanisms wouldn’t be possible in prokaryotes.
name TWO mechanisms of control of gene expression that are only used by eukaryotes and EXPLAIN...
name TWO mechanisms of control of gene expression that are only used by eukaryotes and EXPLAIN WHY each of those mechanisms wouldn’t be possible in prokaryotes.
Trivia Questions 1. This level of control in gene expression prevents a gene from being transcribed...
Trivia Questions 1. This level of control in gene expression prevents a gene from being transcribed when it is not needed. 2. These genes produce proteins that govern the activity of structural genes. 3. These intervening sequences are cut out of an mRNA transcript before it can leave the nucleus. 4. A chromosome is made up of these two molecules. 5. This term refers to DNA that is composed of at least two species. 6. These two vectors are used...
Sample Question: Which of the following types of gene expression control is unlikely to be used...
Sample Question: Which of the following types of gene expression control is unlikely to be used in bacteria? a) Transcriptional control b) Translational control c) RNA processing control d) Protein activity control
Methylation • Add-CH3 groups to a few bases on DNA Why? 1. Control gene expression 2....
Methylation • Add-CH3 groups to a few bases on DNA Why? 1. Control gene expression 2. Initiation of DNA replication 3. Distinguish self DNA from foreign DNA
A commonly used plasmid is the pGEX series, in which the gene to be expressed is...
A commonly used plasmid is the pGEX series, in which the gene to be expressed is placed directly under the control of a lac promoter. Could leaky expression be controlled through the use of BL21(DE3)pLysS cells? Why?
Northern blotting, RT-PCR, and microarrays can be used to analyze gene expression. A lab studies yeast...
Northern blotting, RT-PCR, and microarrays can be used to analyze gene expression. A lab studies yeast cells, comparing their growth in two different sugars, glucose and galactose. One student is comparing expression of the gene HMG2 under these two conditions. Which technique(s) could he use and why? Another student wants to compare expression of all the genes on chromosome 4, of which there are approximately 800. What technique(s) could she use and why?
Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the...
Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the structure of chromatin around a particular gene. One of these mechanisms is the covalent modification of histones to switch DNA between an open and closed confirmation. A second mechanism is the covalent modification of DNA (typically on cytosines) by methylation. A. Describe a type of histone modification and explain what effect is has on chromatin, and how that effect is achieved. a. One type...
Trivia Questions 1. This level of control in gene expression prevents a gene from being transcribed when it is not needed. 2. These genes produce proteins that govern the activity of structural genes. 3. These intervening sequences are cut out of an mRNA transcript before it can leave the nucleus. 4. A chromosome is made up of these two molecules. 5. This term refers to DNA that is composed of at least two species. 6. These two vectors are used...
Sample Question: Which of the following types of gene expression control is unlikely to be used in bacteria? a) Transcriptional control b) Translational control c) RNA processing control d) Protein activity control
Methylation • Add-CH3 groups to a few bases on DNA Why? 1. Control gene expression 2. Initiation of DNA replication 3. Distinguish self DNA from foreign DNA
Part 1. Eukaryotes use at least two distinct mechanisms to control gene expression by altering the structure of chromatin around a particular gene. One of these mechanisms is the covalent modification of histones to switch DNA between an open and closed confirmation. A second mechanism is the covalent modification of DNA (typically on cytosines) by methylation. A. Describe a type of histone modification and explain what effect is has on chromatin, and how that effect is achieved. a. One type...
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