Choose the statements that describe how the helix orients in the tertiary structure of an integral membrane protein.The threonine residues act as membrane interface anchors, interacting with the lipid bilayer and theaqueous environment.The amphipathic helix interacts with the lipid bilayer along its hydrophobic surface, exposing its hydrophilic surface tothe aqueous environment.A group of helices cluster with their polar surfaces in contact with one another and their hydrophobic surfaces facingthe lipid bilayer.The peptide entirely embeds in the lipid bilayer.Incorrect

Plasma membrane is made up of mainly phospholipid and protein. Membrane protein can be classified as…

Answered: Choose the statements that describe how…

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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Similar questions

Protein modifications that involve disulfide bonds occur in the following;(there may be more than one answer) golgi endoplasmic reticulum ) chloroplast (plastids) peroxisome mitochondria
Alpha helices are a type of secondary structure in proteins. What is the length of a 23.0 kDa single-stranded α-helical protein segment? Assume a mean residue mass of 110 Da. length: 209 Incorrect Å
What differences would you expect in the structure of a membrane bound protein versus a cytosolic protein?
A certain protein is used to activate myosin. If the protein is treated with B-mercaptoethanol, it will not activate myosin. What can you say about the structure of this protein? O The peptide is denatured by B-mercaptoethanol O The peptide does not have a thermodynamically stable configuration O The peptide contains more than one distinct chain O The peptide contains disulfide bonds required for activity
Explain how both alpha helices and beta sheets can be used by proteins that cross membranes. Also explain what a hydropathy plot is and how such a plot can be used to differentiate transmembrane alpha helices from transmembrane beta sheets.
Proteins associate with membranes in a number of different ways. identify them and outline their molecular basis.
Which statement about N-linked glycosylation is correct? N-linked oligosaccharides are attached to proteins one sugar at the time in the endoplasmicreticulum. N-linked sugars are attached to proteins as a 14 residue oligosaccharide during translation in the endoplasmic reticulum. N-linked sugars are attached to proteins as a 14 residue oligosaccharide during translation inthe cytoplasm. N-linked sugars are attached to proteins as a 14 residue oligosaccharide after translation inthe Golgi apparatus.
In the "fluid " _______ cell membrane model, lipids are organized in a ________ arrangement, such that _______ portions of the lipids are exposed to either the interior or exterior of the cell, while the lipid portions are sandwiched in the middle of the membrane. As part of the cell membrane, a main function of peripheral proteins is to provide _________ , while a main function of proteins is to provide _________ . Other cell membrane molecules include a compound called __________, which functions to provide fluidity to rigid membranes and rigidity to fluid membranes; and surface carbohydrates, which function in the membrane not to provide energy, but instead to provide _________ _____ . Aminophospholipids (including PE and ) move to the inner leaflet of the membrane, by an enzyme known as the ._______ A main function of the cell membrane is to be very selective as to what is able to cross through, a condition known as a barrier.
Which of the following statement is not true? In a secondary structure the consecutive residues have phi and psi values that are quite different. The Ramachandran diagram defines the restrictions of polypeptide backbone conformation. Two α helices with hydrophobic side chains repeated in a regular pattern can form dimeric structures in water. Greek key motifs occur frequently in antiparallel β structures. Both α helices and β sheets can be amphipathic.
Soap, phospholipids and cholesterol are all amphipathic molecules. Provide a drawing of each and label the polar and non polar areas.
Consider beta-sheet comprised of twelve amino acid residues (two strands of six residues each). How many hydrogen bonds should be formed between backbone atoms in this sheet?
Estimate the number of amino acid residues in each of the two helices of a segment of the alpha-keratin coiled coil that is 23 nm long.

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