# 4: With regard to the Na*-Glucose Symporter (aka Sodium-Glucose Co-transporter), Which of the two solutemolecules (Glucose or Sodium) is being transported against its concentration or electrochemical gradient?Since that solute is being transported against its gradient, what is providing the energy to actively transport itin this specific mechanism?

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Answered: #4: With regard to the Nat-Glucose…

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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What are three types of energy that can power an active transport pump? Provide an example of each type (eg Na/K pump)
pQLScB3CBS-8U2yQp5UAPJA-R3spS6YB8srqTGBoSwdXc_EattnA/viewform dvisor Main... My Drive - Google... Your answer What is the difference between primary active transport and secondary active transport? The sodium potassium pump * Job Listing - USF... WT Enrollment Requir... Is a symporter Can be blocked with drugs Controls intracellular chloride and potassium concentrations Is a glycolipid Breaks down ATP in order to generate energy ATP can be broken down to generate energy * True False A copy of your responses will be emailed to lc21-0506@lclark.edu. Submit Chemic Cle
If a skeletal muscle has depleted its stores of ATP how will the altered transport properties of the following transporters affect cytosolic ion concentrations (increase, decrease, no change) relative to normal? Skeletal Muscle Cell With Depleted ATP Stores Ion transporter Cytosolic K+ Cytosolic Na+ Cytosolic Ca2+ NKA NCX SERCA
Give an example of a secondary active transport event that results from the primary active transportation of Na+ and K+ by the sodium-potassium antiport pump.
Channels are an example of transporters with alternating gates; in other words, channels change conformation upon cargo binding to release the cargo on the opposite side of the membrane. True or False? Polar solutes must be ‘re-hydrated’ by the interactions with the transporter to allow for rapid transport. True or False? The sodium potassium pump is an example of an antiport. True or False?
Does a positive, negative, neutral, or zero ΔG associate with cellular facilitated transport?
3. 4. 5. The waved albatross feeds exclusively on marine organisms and has no access to fresh water. It has specialized nasal glands to excrete excess salt. Consider the cellular mechanisms that might be involved in the productions of the highly concentrated salt solution released by this bird. a) Would the production of the concentrated salt solution be an active process or a passive process? Explain your reasoning. b) What type of membrane transport mechanisms might be involved? c) What problems might arise if the albatross were unable to rid itself of excess salt? Consider the following statement: "An understanding of chemistry is essential to a solid understanding of biological processes." State whether or not you agree with this statement and why. Use at least two specific examples from this course to justify your response. a) Describe, using a diagram or point form notes, what is happening during transcription and translation of protein synthesis. Indicate where these events take…
the sodium channel exchanger NCX transports sodium into and calcium out of cardiac muscle cells. Describe why this itransporter is classified as secondary active transport?
The studies of Palade and colleagues used pulse chase labeling with radioactively labeled amino acids and auto radiography to visualize the location of newly synthesized proteins in pancreatic acinar cells. These early experiments provided invaluable information on protein synthesis and intercompartmental transport. New methods have replaced these early approaches, but two basic requirements are still necessary for any assay to study this type of protein transport. What are they, and how do recent experimental approaches meet these criteria?
How do two alpha-helices at the constriction point of the Aquaporin 5 transporter protein prevent H3O+ molecules from forming a H+ wire that prevents the transport of H₂O molecules across the membrane? alpha-helices have inverted dipoles that reorient H₂O molecules in the channel to break H₂O/H₂O H-bonds. alpha-helices are amphipathic and can reorient H₂O molecules in the channel to break H₂O/H₂O H-bonds O alpha-helices have inverted dipoles that reorient H3O+ molecules in the channel to form H3O*/ H3O+ H-bonds. O alpha-helices have parallel dipoles that align H₂O molecules in the channel to break H₂O/H2₂O H-bonds. alpha-helices have Lys residues that reorient H₂O molecules in the channel to break H₂O/H₂O H-bonds.
Various chemical methods can be used to permeabilize or lyse cells including the use of enzymes. List three important factors to consider when developing a lysis method using enzymes. Estimate the osmotic pressure drop across the membrane of an animal cell in a 0.10 M NaCl solution, assuming that the internal total solute concentration is 0.36 osM and temperature is 30.0°C. Do you think that this pressure drop would lyse cells? Why or why not?

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