5. Patients suffering from Familial Hypercholesterolemia (FH) can carry a mutation in one ofseveral genes. Two of these genes are ApoB and PCSK9.6a. Diagram the normal cholesterol sensing pathway for a healthy person. This should befocused on the molecules that handle cholesterol and that regulate cholesterolproduction, NOT on patient symptoms.b. On your diagram indicate where a mutation in Apoß disrupts cholesterol sensing. Thenwrite a paragraph or two explaining how cholesterol sensing is specifically disrupted inpatients with an Apoß mutation.c. On your diagram indicate where a mutation in PCSK9 disrupts cholesterol sensing. Thenwrite a paragraph or two explaining how cholesterol sensing is specifically disrupted inpatients with PCSK9 mutation.Ain cancers. One approach focuses on the

LDL carries cholesteryl esters within it. LDL thereby transports cholesterol (in the form of…

Answered: Patients suffering from Familial…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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TAS2R38 codes for a G-protein coupled receptor which contributes to the tasting of PTC. What does this tell you about PTC as a type of ligand? a It is a protein-based ligand that can cross the CM into the cell b It is a lipid based ligand that can cross the CM into the cell c It is a protein-based ligand that requires a second messenger d It is a lipid-based ligand that requires a second messenger
Describe the protein kinase cascade stimulated by epinephrine in liver cells or by insulin in muscle cells. How can it go wrong? What happens if it goes wrong? Explain the usefulness of protein kinase cascades and mechanisms to shut them down. Please give explanations for every step of this pathway. Define all technical terms you use.
1. Plays an important role in intracellular signaling 2. helps maintain an erection in men 3. has a key role in glycoprotein synthesis 4. Helps control diabetes by reducing blood sugar and insulin resistance 5. facilitates absorption of minerals such as Potassium, Magnesium, and Calcium 6. removes toxic substances from the breakdown of muscle proteins during intensive exercise 7. has a synergistic effect with Vitamin E and Selenium 8. Needed to produce tryptophan 9. Protects myelin sheath 10. facilitates removal of heavy metals such as mercury Choices for the answers: A. Alanine B. Cysteine C. Glutamine D. Glutathione E. Glycine F. Serine G. Taurine H. Aspargine I. Aspartic Acid J. Proline K. L-arginine L. Tyrosine
give the basics of a disease and its relationship to a faulty signal transduction pathway. Describe some of these diseases in the table below:
What is the purpose of A kinase–associated proteins (AKAPs)? Describe how AKAPs work in heart muscle cells.
A hormone signals through a G protein-coupled receptor as shown in the diagram. After the production of IP3, which of these events will MOST quickly stop the transduction of the signal? A. the hydrolysis of IP3 B. the hydrolysis of GTP C. the hydrolysis of PIP2 D. the hydrolysis of the hormone I believe the answer is (B) the hydrolysisof GTP, because the G protein becomes inactive after GTP is hydrolyzed to GDP. However, the solution provided by Bartleby is (C). Please explain. Thanks
The G-protein Ras is involved in proliferative signaling, and is mutated is a large fraction of human cancers. Almost all mutations in Ras mutate the glycine at codon 12. These mutations lock Ras in an active conformation. How will the GTPase activity of a Ras protein with a G12 mutation compare to a normal Ras protein without the mutation? (10 words maximum)
It is important for the cell to be able to terminate responses, and diminish responsiveness to prevent overstimulation. Cells have different mechanisms for this. One such mechanism is receptor down regulation. a.) Down regulation describes a decrease in the availability of hormones or neurotransmitters that bind to receptors on the surface of target cells, making the cells less likely to be stimulated. b.) Down regulation describes glycosylation of receptor proteins receptors on the surface of target cells in order to decrease the selectivity of ligand binding, making the cells less sensitive to a hormone or neurotransmitter. c.) Down regulation describes a decrease in the number of receptors on the surface of target cells, making the cells less sensitive to a hormone or neurotransmitter.
Receptor-mediated endocytosis is used to remove low-density lipoproteins (LDLs) from the blood. What effect would defective LDL receptors have on a patient’s cholesterol levels and overall risk for heart disease? View Available Hint(s)for Part A Patients would have very low levels of LDL and a low risk of heart disease. Patients would have very high LDL levels and a high risk of heart disease. Patients would have moderate levels of LDL and a low risk of heart disease. Patients would have high LDL levels but a low risk of heart disease.
Serotonin is a neurotransmitter that is a small, soluble molecule. P11 (a small protein) is required for transport of serotonin receptors to the cell surface. Assume for this problem that p11 affects transport of serotonin receptors only, and that it does not affect transport of any other proteins (a simplification). Depressed people seem to have low levels of p11; treatments that improve mood increase the expression of the p11 gene. NSAIDs (aspirin, ibuprofen, etc.) seem to decrease expression of p11. SSRIs (selective serotonin reuptake inhibitors) decrease re-uptake of serotonin at synapses. Some depressed patients are helped by SSRIs, but some are not. Explain both parts of B. B-1. The results indicate that depression can be caused by levels of serotonin receptors that are (higher than normal) (lower than normal) (neither – no evidence here for any effect on depression) (higher or lower but can't tell which). B-2. If a depressed person does not respond to SSRIs, the person…
Imagine a disease that involves reduced expression of receptor X. There is no concentration of full agonist that can restore receptor X signaling back to normal levels. Explain how an allosteric modulator may be used to help in this situation.
In a clinical study, it was found that copaiba essential oil positively regulated multiple signaling pathways in neuronal cells. These included the following signaling pathways which regulate neuronal metabolism, proliferation and immunity: (Select all that apply.) Choose at least one answer. a. AMPK b. pI3K/Akt/mTOR c. MAPK d. JAK/STAT

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