Homework Answers
33) G protein linked receptor and an ion channel
Cholera toxin causes the G protein's ADP ribosylation which causes it to remain activated all the time. Adenylate cyclase enzyme thus is activated all the time and cAMP is formed all the time, resulting in efflux of Cl- ions out of the cell through the CFTR ion channel and decreased influx of chloride ion. In order to maintain the ionic balance the intestinal cells will expel water out which results in diarrhea.
36) Small molecules that propagate a signal after it has been initiated by the signaling molecule binding to the receptor.
The first messengers are the hormones or the agonists that activate the receptors.
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Question 33 (1 point) Cholera is an infections disease that causes extreme diarrhea, what cell to...
Question 26 2.2 p The phosphorylation of specific amino acids is a characteristic of the cell...
Question 26 2.2 p The phosphorylation of specific amino acids is a characteristic of the cell producing the ligand. e a class of GTP G-protein signal receptors. secondary messengers. receptor tyrosine kinases. transcription factors. Signal transduction is initiated O when the chemical signal is released from the signaling cell. o when the signal molecule alters the receptor protein in some way. o after the target cell divides. after the ligand is degraded. o when the receptor protein is synthesized.
Question (1 point) 1st attempt Which statement is true about cell-surface receptors? Choose one: O All...
Question (1 point) 1st attempt Which statement is true about cell-surface receptors? Choose one: O All extracellular signal molecules bind to a single type of receptor. O All cell-surface receptors bind to a single, unique extracellular signal molecule. O Each cell-surface receptor can bind to an endless variety of extracellular signal molecules. Some cell-surface receptors can bind to multiple signal molecules. O All drugs block the activation of ion-channel-coupled receptors. 11 OF 15 QUESTIONS COMPLETED 07/15 >
1. In paracrine signaling, the signaling molecules affects only: Target cells close to the cell from...
1. In paracrine signaling, the signaling molecules affects only: Target cells close to the cell from which it was secreted a. b. Target cells distant from its site of synthesis in cells of an endocrine organ Both a. and b. с. d. None of these 2. Below are listed the events that occur in cell to cell communication. Signal transduction occurs 1. 2. Plasma membrane receptor binds with a ligand A cellular response is effected 3. 4. Ligand is released...
Question 1 (1 point) Vasoconstriction occurs when epinephrine (adrenaline) binds to the a-adrenergic receptor on vascular...
Question 1 (1 point) Vasoconstriction occurs when epinephrine (adrenaline) binds to the a-adrenergic receptor on vascular smooth muscle cells. One way to treat high blood pressure is to administer competitive inhibitors that bind to this receptor. The Kd for binding of epinephrine to this receptor is ~UM. Based on the measured affinity (Kd) of the following drugs for the a-adrenergic receptor, which might be good candidates for high blood pressure medication? Drug A: Kd = 0.6 M; Drug B: Kd...
During the aerobic metabolism of glucose, glucose is ____________. Reduced to form water Oxidized to form...
During the aerobic metabolism of glucose, glucose is ____________. Reduced to form water Oxidized to form water Reduced to form CO2 Oxidized to form CO2 Which of the following describes the equation: FAD + XH2 à FADH2 + X. FAD is reduced to FADH2 It is a coupled reduction – oxidation reaction XH2 is oxidized to X All of the above Which of the following is FALSE about glycolysis? The initial steps of glycolysis requires energy derived from the splitting...
QUESTION 1 In E. coll, what two promoter regions are recognized by the s70 subunit? the...
QUESTION 1 In E. coll, what two promoter regions are recognized by the s70 subunit? the -10 and 35 regions the - 10 region and the Pribnow box the-10 and -70 regions the-35 and -70 regions QUESTION 2 Which protein must first bind to the origin of replication for DNA synthesis to begin? DNA polymerase DnaA helicase Single-strand binding protein Click Save and Submit to save and submit. Click Save All Answers to save all answers. 2 Ch 16 PPT...
I'd like to ask the answers for all of the uestions Question 1. A reaction in...
I'd
like to ask the answers for all of the uestions
Question 1. A reaction in an anabolic pathway in a cell has a AG of +2.5 kcal/mol. Which of the following is true regarding this reaction? A. It will occur spontaneously. B. The product of the reaction has a lower free energy than the reactants. C. It can occur if it is coupled to ATP hydrolysis. D. It is an exergonic reaction. E. It is breaking a polymer into...
1. According to the paper, what does lactate dehydrogenase (LDH) do and what does it allow...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
Question 26 2.2 p The phosphorylation of specific amino acids is a characteristic of the cell producing the ligand. e a class of GTP G-protein signal receptors. secondary messengers. receptor tyrosine kinases. transcription factors. Signal transduction is initiated O when the chemical signal is released from the signaling cell. o when the signal molecule alters the receptor protein in some way. o after the target cell divides. after the ligand is degraded. o when the receptor protein is synthesized.
Question (1 point) 1st attempt Which statement is true about cell-surface receptors? Choose one: O All extracellular signal molecules bind to a single type of receptor. O All cell-surface receptors bind to a single, unique extracellular signal molecule. O Each cell-surface receptor can bind to an endless variety of extracellular signal molecules. Some cell-surface receptors can bind to multiple signal molecules. O All drugs block the activation of ion-channel-coupled receptors. 11 OF 15 QUESTIONS COMPLETED 07/15 >
1. In paracrine signaling, the signaling molecules affects only: Target cells close to the cell from which it was secreted a. b. Target cells distant from its site of synthesis in cells of an endocrine organ Both a. and b. с. d. None of these 2. Below are listed the events that occur in cell to cell communication. Signal transduction occurs 1. 2. Plasma membrane receptor binds with a ligand A cellular response is effected 3. 4. Ligand is released...
Question 1 (1 point) Vasoconstriction occurs when epinephrine (adrenaline) binds to the a-adrenergic receptor on vascular smooth muscle cells. One way to treat high blood pressure is to administer competitive inhibitors that bind to this receptor. The Kd for binding of epinephrine to this receptor is ~UM. Based on the measured affinity (Kd) of the following drugs for the a-adrenergic receptor, which might be good candidates for high blood pressure medication? Drug A: Kd = 0.6 M; Drug B: Kd...
QUESTION 1 In E. coll, what two promoter regions are recognized by the s70 subunit? the -10 and 35 regions the - 10 region and the Pribnow box the-10 and -70 regions the-35 and -70 regions QUESTION 2 Which protein must first bind to the origin of replication for DNA synthesis to begin? DNA polymerase DnaA helicase Single-strand binding protein Click Save and Submit to save and submit. Click Save All Answers to save all answers. 2 Ch 16 PPT...
I'd
like to ask the answers for all of the uestions
Question 1. A reaction in an anabolic pathway in a cell has a AG of +2.5 kcal/mol. Which of the following is true regarding this reaction? A. It will occur spontaneously. B. The product of the reaction has a lower free energy than the reactants. C. It can occur if it is coupled to ATP hydrolysis. D. It is an exergonic reaction. E. It is breaking a polymer into...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
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