How do protein channels distinguish charged ions for selective transport? particularly in reference to ionic radii, and...
How do protein channels distinguish charged ions for selective transport?
particularly in reference to ionic radii, and free energy of hydration.
Homework Answers
There are two classes of ionophoric proteins, Ion channels and ion transporters. The ion channels are narrow, water-filled tunnels that allow only ions of a certain size and/or charge to pass through. This characteristic is called selective permeability. The archetypal channel pore is just one or two atoms wide at its narrowest point and is selective for specific species of ion, such as sodium or potassium. They are distinguishable due to their high ionic flow rate and flowing according to electrochemical gradient. Free energy of hydration also plays important role in the selectivity of ions passing through the channel.
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How do protein channels distinguish charged ions for selective transport? particularly in reference to ionic radii, and...
Briefly explain how the presence of charged ions in ionic solids such as NaCl(s) helps to...
Briefly explain how the presence of charged ions in ionic solids such as NaCl(s) helps to explain why NaCl(s) is soluble in water.
9. In the electron transport chain picture above, how do electrons move from protein complex I to protein c...
9. In the electron transport chain picture above, how do electrons move from protein complex I to protein complex II? 1. I need you to remember that "Q" is ubiquinone which gets reduced at proteins l & I, and oxidized at protein III. "Reduced" means gains electrons, "oxidized" means loses electrons. 2. I need you to remember how "Q" moves from protein I to protein Do you remember? Don't overthink it, Preeda. As far as scientists know right now, the...
How do cAPK enzymes distinguish one serine from another and one protein from another?
How do cAPK enzymes distinguish one serine from another and one protein from another?
How do you elute proteins from an affinity column where the protein is bound to a...
How do you elute proteins from an affinity column where the protein is bound to a ligand which is attached to beads? Add a large amount of the free ligand that specficially binds the protein to compete for binding to the protein. Add SDS to denature the proteins. Add increasing amounts of salt to compete for ionic bonds with the protein. Wash the column with a large amount of buffer so that even the smallest molecules can filter through.
O D Side-by-Side The thermodynamics of vesicle loading: Primary and secondary active transport "Vesicle loading is a...
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Q13 Cyanide is a deadly poison that attaches to cytochrome c oxidase, the last protein in...
Q13 Cyanide is a deadly poison that attaches to cytochrome c oxidase, the last protein in the electron transport chain before the terminal electron acceptor. Based on your knowledge of the electron transport chain, which statement below best describes the action of cyanide on the body? A. Cyanide does not allow the Krebs cycle to be completed by blocking acetyl CoA from entering this cycle. This action shuts down the entire process of cellular metabolism. B. Cyanide does not allow...
change pas channels in the volta t ive protein to change shape. This A of the...
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...
Question 22 4 pts If all the batteries currently present in the world were fully charged and connected to supply the world's energy, how long could we run the world on this system? Less than one h...
Question 22 4 pts If all the
batteries currently present in the world were fully charged and
connected to supply the world's energy, how long could we run the
world on this system? Less than one hour About one day A few weeks
About one month More than one month Flag this Question Question 23
4 pts What is the importance of batteries in using renewable energy
such as solar and wind power? Batteries are very energy dense.
Batteries provide...
The process(es) of a. osmosis b. diffusion c. facilitated diffusion d. active transport e. two of the above 7. do...
The process(es) of a. osmosis b. diffusion c. facilitated diffusion d. active transport e. two of the above 7. do NOT proceed to equilibriunm 8. The process of br a. Phagocytosis b. Pinocytosis c. Receptor mediated endocytosis d. None of the above ringing large particles into the cell using vesicles is called 9. Water is capable of forming hydrogen bonds because a. the hydrogen atoms carry partial positive charges. b. the oxygen atom carries a partial negative charge. c. it...
23. Consider these three sequences contained within single beta strands. Which is most likely to have ionic interaction...
23. Consider these three sequences contained within single beta strands. Which is most likely to have ionic interactions between side chains at physiological pH? Explain your choice. Sequence 1: Ala-Glu- Leu- Arg Sequence 2: Ala - Glu - Arg-Leu Sequence 3: Leu - Ala - Glu- Arg 24. The equilibrium between the native state (N) and the unfolded state (U) of a protein can be represented by the chemical equation N U, with a AG value that represents the equilibrium....
9. In the electron transport chain picture above, how do electrons move from protein complex I to protein complex II? 1. I need you to remember that "Q" is ubiquinone which gets reduced at proteins l & I, and oxidized at protein III. "Reduced" means gains electrons, "oxidized" means loses electrons. 2. I need you to remember how "Q" moves from protein I to protein Do you remember? Don't overthink it, Preeda. As far as scientists know right now, the...
How do you elute proteins from an affinity column where the protein is bound to a ligand which is attached to beads? Add a large amount of the free ligand that specficially binds the protein to compete for binding to the protein. Add SDS to denature the proteins. Add increasing amounts of salt to compete for ionic bonds with the protein. Wash the column with a large amount of buffer so that even the smallest molecules can filter through.
O D Side-by-Side The thermodynamics of vesicle loading: Primary and secondary active transport "Vesicle loading is another interesting application of thermodynamics. Think about it. How do neurons form these highly concentrated vesicles full of, say. Ach? It turns out that neurons use a two-step system. First, neurons use the Gibb's free energy from hydrolyzing ATP to pump H+ ions into the vesicle using an H+/ATPase. Given the provided information, and assuming the vesicular membrane potential is 20 mV (positive inside...
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...
Question 22 4 pts If all the
batteries currently present in the world were fully charged and
connected to supply the world's energy, how long could we run the
world on this system? Less than one hour About one day A few weeks
About one month More than one month Flag this Question Question 23
4 pts What is the importance of batteries in using renewable energy
such as solar and wind power? Batteries are very energy dense.
Batteries provide...
The process(es) of a. osmosis b. diffusion c. facilitated diffusion d. active transport e. two of the above 7. do NOT proceed to equilibriunm 8. The process of br a. Phagocytosis b. Pinocytosis c. Receptor mediated endocytosis d. None of the above ringing large particles into the cell using vesicles is called 9. Water is capable of forming hydrogen bonds because a. the hydrogen atoms carry partial positive charges. b. the oxygen atom carries a partial negative charge. c. it...
23. Consider these three sequences contained within single beta strands. Which is most likely to have ionic interactions between side chains at physiological pH? Explain your choice. Sequence 1: Ala-Glu- Leu- Arg Sequence 2: Ala - Glu - Arg-Leu Sequence 3: Leu - Ala - Glu- Arg 24. The equilibrium between the native state (N) and the unfolded state (U) of a protein can be represented by the chemical equation N U, with a AG value that represents the equilibrium....
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