Please answer it using drawings and labeling only. 2. Within a cellular environment, draw the sequence of events that occur whenextracellular LDL binds to the LDL receptor through generation ofcholesterol. Represent the sequence of events numerically. Label all relevantcellular structures.Details to include:components of the endocytic pathway and the pH of the compartmentsrepresentation of the LDL binding domain and beta-propeller domain of theLDL receptor.Conformation of LDL receptorUse a "+"to indicate when histidine(s) become protonated on the LDLreceptor.V-ATPases

Macromolecules that carried into the cells membrane bound vesicles derived by the invagination and…

Details to include: components of the endocytic pathway and the pH of the compartments representation of the LDL binding domain and beta-propeller domain of the LDL receptor. Conformation of LDL receptor Use a "+"to indicate when histidine(s) become protonated on the LDL receptor. V-ATPases

Details to include: components of the endocytic pathway and the pH of the compartments representation of the LDL binding domain and beta-propeller domain of the LDL receptor. Conformation of LDL receptor Use a "+"to indicate when histidine(s) become protonated on the LDL receptor. V-ATPases

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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For each of the following statements, indicate whether it is true or false. [Select] [Select] The LDL particles are internalized through the endocytic pathway. A mutation that impairs the association of the LDL receptor with adaptin would cause depletion of LDL in the blood. [Select] In the endosome, the LDL particle dissociates from the LDL receptor because the pH in the endosome is higher than that in the transport vesicle. [Select] A mutation that impairs the recruitment of the LDL receptor into clathrin-coated vesicles would cause a decrease in cellular cholesterol level.
A. Elastase is activated by trypsinB. Trypsinisactivatedbyelastase Which statement is correct? Proteolytic activation of chymotrypsin from chymotrypsinogen requires cleavage of four peptide bonds. Assume that any proteases can convert 100 substrates to 100 products. Activation of one enteropeptidase can eventually lead to formation of how many chymotrypsin proteins?
7. To improve the digestion of food proteins in chronic inflammatory-dystrophic disorders of the pancreatic gland, stomach or intestine patients are prescribed mezym forte (pancreatin) containing pancreatic enzymes. What is the remedial mechanism of this drug? For the answer: a) enumerate enzymes digesting proteins in the gastrointestinal tract; b) specify the mechanism of proteolytic enzyme activation; c) draw the schemes of these enzymes activation, point out the activators; d) explain the specificity of proteases; e) describe the consequences of these enzymes activation in the tissue of pancreas.
5. Treatment of the patients with familial hypercholesterolemia by statins (pravastatin, for instants) allows to decrease cholesterol levels in blood up to the normal range. Explain the statin action on the cholesterol metabolism. For that: a) draw the scheme of the cholesterol synthesis, indicate the key enzyme of the pathway; b) name all mechanisms of the key enzyme regulation and statin's action; c) describe the structure of LDL receptor and its function in cholesterol metabolism; d) explain the cause of familial hypercholesterolemia and the symptoms of the disease.
In acute lymphoblastic leukemia, the cancerous white blood cells typically lack the enzyme asparagine synthetase. Why is the administration of asparaginase an eff ective therapy for this type of cancer?
Some are unable to taste thiourea and PTC. DNA sequence results for these individuals show a normal predicted amino acid sequence for the TAS2R38 gene. Provide an explanation that can account for insensitivity to thiourea. (a) First assuming a mutation involving the TAS2R38 gene (b) Then assuming a mutation in a gene other than TAS2R38
Pertussis toxin ADP ribosylates the a subunit of Gi. How would you expect this toxin to affect blood pressure?
a. What is the function of bactoprenol in peptidoglycan synthesis? b. During peptidoglycan synthesis, removal of a phosphate group from bactoprenol pyrophosphate is inhibited. What is the immediate outcome? What does this mean for cell wall synthesis? Which antibiotic works via this mechanism? c. Bacterium Y is photosynthetic. You want to decrease the ability of Bacterium Y to produce glucose through photosynthesis. Explain how you could manipulate the light reactions of photosynthesis to decrease glucose production during the dark reactions in Bacterium Y. Include the name of the pathway that makes glucose during the dark reactions, which/how molecules from the light reactions are used in this pathway, and what specific steps of this pathway would be affected by your manipulations.
From the three figures below, indicate which represents best the catalytic pocket of trypsin, a serine protease, secreted by acinar pancreatic cells. C) A) A. Figure A. B.Figure B. ⒸC. Figure C. Asp 189 B) Asp 189 Val 190 Val 216 work of Val 216 Val 190
a. When a chromophore binds to proteins, the binding site is generally more hydrophobic than the solution. Then, what kind of shift do you expect to observe in the absorption peak position compared to the peak observed when the chromophore is free in solution?
B) Read the situations below and indicate which of the four methods of enzyme regulation is occurring for each. a) The energy-carrying molecule ATP is made by the enzyme ATP synthase. Muscle cells use a lot of energy and also have higher amounts of the ATP synthase enzyme than many ouier cem types. General mechanism of enzyme regulation: /1 b) Prostaglandins are messenger molecules involved in the inflammatory response, as well as th perception of pain. They are synthesized from polyunsaturated fatty acid substrates by an enzyn called cyclo-oxygenase. "Ibuprofen" is the active ingredient in a variety of anti-inflammatory medications such as Motrin® and Advil®. It reduces pain and swelling by binding to a hydrophobic channel in the active site of cyclo-oxygenase, blocking the polyunsaturated fatty acids from binding to the enzyme, and therefore stopping production of prostaglandins. General mechanism of enzyme regulation: a) In point form, describe the steps by which ATP is produced…
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