Part a) Would a single alpha helix be more stable in a aqueous solution or a membrane. Explain why. Part b) Why do transmembrane proteins always have secondary structures inside the membrane but aqueous proteins do not? Part c) If you had a single alpha helix, can it act as a pore for a membrane. Explain.

Part a) Would a single alpha helix be more stable in a aqueous solution or a membrane. Explain why. Part b) Why do transmembrane proteins always have secondary structures inside the membrane but aqueous proteins do not? Part c) If you had a single alpha helix, can it act as a pore for a membrane. Explain.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 10RQ: Which plasma membrane component can be either found on its surface or embedded in the membrane...

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Similar questions

Which plasma membrane component can be either found on its surface or embedded in the membrane structure? a. protein b. cholesterol c. carbohydrate d. phospholipid
There is a long chain of amino acids with long sections that are mostly polar, alternating with long sections that are nonpolar. How would this chain be organized if it were destined to become a transmembrane protein? A cytoplasmic protein?
Why do most molecules require the assistance of proteins to cross the cellular membrane? What factors limit diffusion of molecules across the cellular membrane?
Which of these structures would you expect to find as part of the transmembrane portion of an integral membrane protein? Structure B would be part of the transmembrane domain of an integral membrane protein. Structure C would be part of the transmembrane domain of an integral membrane protein. Structure A would be part of the transmembrane domain of an integral membrane protein.
In what way do proteins embedded in a membrane differ structurally from soluble proteins?
Why do they do not penetrate through the lipid bilayer?
If a doctor injected a patient with what was labeled as an isotonic saline solution, but then the patient died, and an autopsy revealed that several of the patient's red blood cells had burst, such as in the image on the right, would it be true that the injected solution was really isotonic? Why or why not?
what purpose does the plasma membrane’s hydrophobic interior serve?
Why don’t proteins turn around in biological membraneslike revolving doors?
why do transmembrane proteins cross the phospholipid bilayer as an a-helix or B-barrel? A. These structures arrange polar peptide bonds and hydrogen bonds to the exterior of the helix or barrel while nonpolar side chains are on the interior. B. These structures sequester polar peptide bonds and hydrogen bonds to the interior of the helix or barrel while nonpolar sidechains are on the exterior.
Which portion of the phosphatidylinositol molecule contributes to (a) fluidity of the bilayer and (b) the surface polarity of the bilayer?
Proteins, like lipids, are free to move in the membrane. How do we know this?