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According to guidelines, I can only answer 1 question. But I am gonna try to give maximum answers.
1. Huntington's is a loss of function disease and is dominant.
2. Phosphofructokinase is the most important control element in the mammalian glycolytic pathway (Figure 16.16). High levels of ATP allosterically inhibit the enzyme in the liver (a 340-kd tetramer), thus lowering its affinity for fructose 6-phosphate. So it's true.
3. Actin is a housekeeping gene.
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Which of the following statements about Huntington's is true? You can retry this question, the average...
Yet, all the cells in your body contain the same genes (and same alleles). The difference...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
1) Which of the following conditions is most likely to cause the lactose operon to be...
1) Which of the following conditions is most likely to cause the lactose operon to be transcribed? A) There is more glucose in the cell than lactose. B) There is glucose but no lactose in the cell. C) The cyclic AMP and lactose levels are both high within the cell. D) The CAMP level is high and the lactose level is low. 2) How does the transcription of structural genes in an inducible operon occur? A) It occurs continuously in...
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...
LUCIDUVIIDIUV SCI ed: Nov 14 at 2:03pm iz Instructions Question 64 10 pts Answer the following...
LUCIDUVIIDIUV SCI ed: Nov 14 at 2:03pm iz Instructions Question 64 10 pts Answer the following questions in regards to the lac operon under the following conditions. CAMP levels are very low. Lactose is present. 1) Are glucose levels high or low? 2) Is the repressor active or inactive? 3) What (or Why is it) activated/inactivated the repressor? 4) Is the CAP active or inactive 5) How much transcription would occur at the lac operon? Here you only need to...
for 1-5 define those The Lac operon is an inducible set of genes found in bacteria...
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
You are studying a bacterium that utilizes a sugar called athelose. This sugar can be used...
You are studying a bacterium that utilizes a sugar called athelose. This sugar can be used as an energy source when necessary. Metabolism of athelose is controlled by the ath operon. The genes of the ath operon code for the enzymes necessary to use athelose as an energy source. You have found the following: *The genes of the ath operon are expressed only when the concentration of athelose in the bacterium is high. *When glucose is absent, the bacterium needs...
If we placed a bacterium into a medium that contained neither lactose nor glucose (let's give...
If we placed a bacterium into a medium that contained neither lactose nor glucose (let's give them arabinose instead), what will be the level of transcription from the lac operon? O A OFF (fully repressed, but not activated) O B BASAL (neither repressed nor activated) O C HIGH (not repressed, but activated) O D OFF (both repressed and activated, but the repressor "wins") Under what conditions do we get maximum transcription from the lac operon? O A When both glucose...
The gene machine program shows you what happens when lactose is present in E. coli, and...
The gene machine program shows you what happens when lactose is present in E. coli, and how the lac operon is under negative control. However, the lac operon is also under positive control from a protein called CRP, eAMP Receptor Protein. The absence of the lac repressor is essential but not sufficient for effective transcription of the lac operon. RNA polymerase also depends on the presence of CRP. Like the lac repressor, which can bind to the DNA and lactose....
please help me with the question 15 to 18. Basic structure of an operon Note that...
please help me with the question 15 to 18.
Basic structure of an operon Note that the diagram below is one section of DNA master strend with some areas of DNA labeled in blocks The bracketed area illustrates the basic parts of an operon repressor gene promoter operator structural genes DNA 3 mRNA 5 - 3 repressor protein shown attached to operator #2 Repressor preten "Use purple to color in the repressor gene. The repressor gene codes for a repressor...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression of the normal (wild type) operon is given. Note that "ON" and "OFF" refer to whether the operon is expressed at high levels (ON) or basal//low/no levels (OFF). (Hint: mutations render the indicated site inactive while leaving the remaining part of the operon or protein functional.) Note...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
1) Which of the following conditions is most likely to cause the lactose operon to be transcribed? A) There is more glucose in the cell than lactose. B) There is glucose but no lactose in the cell. C) The cyclic AMP and lactose levels are both high within the cell. D) The CAMP level is high and the lactose level is low. 2) How does the transcription of structural genes in an inducible operon occur? A) It occurs continuously in...
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...
LUCIDUVIIDIUV SCI ed: Nov 14 at 2:03pm iz Instructions Question 64 10 pts Answer the following questions in regards to the lac operon under the following conditions. CAMP levels are very low. Lactose is present. 1) Are glucose levels high or low? 2) Is the repressor active or inactive? 3) What (or Why is it) activated/inactivated the repressor? 4) Is the CAP active or inactive 5) How much transcription would occur at the lac operon? Here you only need to...
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
If we placed a bacterium into a medium that contained neither lactose nor glucose (let's give them arabinose instead), what will be the level of transcription from the lac operon? O A OFF (fully repressed, but not activated) O B BASAL (neither repressed nor activated) O C HIGH (not repressed, but activated) O D OFF (both repressed and activated, but the repressor "wins") Under what conditions do we get maximum transcription from the lac operon? O A When both glucose...
The gene machine program shows you what happens when lactose is present in E. coli, and how the lac operon is under negative control. However, the lac operon is also under positive control from a protein called CRP, eAMP Receptor Protein. The absence of the lac repressor is essential but not sufficient for effective transcription of the lac operon. RNA polymerase also depends on the presence of CRP. Like the lac repressor, which can bind to the DNA and lactose....
please help me with the question 15 to 18.
Basic structure of an operon Note that the diagram below is one section of DNA master strend with some areas of DNA labeled in blocks The bracketed area illustrates the basic parts of an operon repressor gene promoter operator structural genes DNA 3 mRNA 5 - 3 repressor protein shown attached to operator #2 Repressor preten "Use purple to color in the repressor gene. The repressor gene codes for a repressor...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression of the normal (wild type) operon is given. Note that "ON" and "OFF" refer to whether the operon is expressed at high levels (ON) or basal//low/no levels (OFF). (Hint: mutations render the indicated site inactive while leaving the remaining part of the operon or protein functional.) Note...
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