Which of the following secondary structures would you expect to find on the surface of a globular protein?Alpha helixBeta sheeta, b, and c if the polar and charged amino acid side chains face the surface of the protein.Loops between two alpha-helicesNext

Proteins are composed of amino acids. They are linked together by peptide linkages. Proteins have…

Answered: Which of the following secondary…

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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Biological membranes are critical components of cells that allow compartmentalisation of cellular contents. The diagram shows a biological membrane comprised of a lipid bilayer with a single polypeptide integrated into the membrane and spanning the membrane seven times. What types of amino acids are likely present in the parts of the polypeptide chain labelled 1-7 and in the parts of labelled A-G? What is the name of the effect that forces the polypeptide to arrange itself like this within the lipid bilayer? Give an example of a type of molecule that can move freely across the lipid bilayer and explain why it can do so based on its chemical properties.
ch one of the following statements about protein structure is NOT correct? . Domains are discrete parts of a protein structure, usually associated with a particula function. true Beta-sheets are stabilised by hydrogen bonds between amino-hydrogens and carbonyl-oxygens from peptide bonds. no adjacent hydrogen bonding Proteins made from three polypeptide chains show quaternary structure. Yes Smaller protein domains come together to from supersecondary structures and mo
Which of the following is/are incorrect about the differences between globular and membrane proteins? 1. Membrane proteins are embedded in a lipid environment while globular proteins are solvated by water. 2. The surface of membrane proteins are likely to feature amino acid residues with hydrophobic side chains. 3. Globular proteins, because of their environment, do not have amino acid residues with hydrophobic side chains. 4. No membrane protein has any portions that are exposed to water. O 2 and 3 O 1 O 3 O 4 O 3 and 4
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Your friend has discovered a protein that they suspect is glycosylated. They decide to perform a series of tests to determine the nature of the oligosaccharide. Assuming/Knowing the following: Fucose molecular weight is approximately 164 Galactose molecular weight is approximately 180 GalNAc molecular weight is approximately 221 Mannose molecular weight is approximately 180 Sialic Acid molecular weight is approximately 309 Neuraminidase cleaves before a Sialic Acid (Sialic Acid and anything after leaves the protein) Beta-galactosidase cleaves after a Galactose (Galactose and anything before remains on the protein) Peanut Agglutinin binds to GalNAc Concanavalin A binds to Mannose Hemagglutinin binds to Sialic Acid Based on preliminary results, they suspect that the oligosaccharide is 7 glycosides long and weighs a total of 1414 g/mol They carried out the following experiments: they treated the protein with either a glycosidase or a lectin, and then pelleted the protein using…
Fats are constructed from two types of smaller molecules: a glycerol and three (????). Phospholipids Peptides Fatty acids Wisemen Two fatty acids and a phosphate group attached to a glycerol make a (????). Plasma membrane Carbohydrate Phospholipid Promethiosome The primary structure of a protein is the sequence of (????). Amino acids Fatty acids Nucleic acids Monosaccharides
Which of the following is/are least likely to be found in an alpha helix because it has an inappropriate Phi angle. a Polar charged amino acids b Proline c Nonpolar amino acids d Glycine e Polar uncharged amino acids
For this homework it’s a protein but I am stuck because it asks This molecule can have _____ levels of structure And then it asks What level of structure is shown in this protein marcromolecule Then asks if I add another chain to this molecule what level of structure will that be? What are the other levels of structure it can have and how are they formed
What general structural feature is shared by proteins that specifically form homodimers (but not homotrimers, homoteramers etc)? Only one answer is correct. the surface consists of hydrophilic alpha-helix. the surface is highly modified by post-translational modification. the surface is permanently bound by chaperones. the surface is unstructured. the surface, or part of it, is self-complementary.
In the tertiary structure of a protein, which pair of amino acid side chains would be most likely to participate in hydrogen bonds? Asn / Ala Ser / Cys Thr/Val Tyr/ Phe Gln/Thr
Determine whether the following statements describing protein structures is correct or incorrect. CORRECT INCORRECT Proteins in a primary structure consist of a simple polypeptide chain. Interactions between the R groups in amino acids form tertiary structure. Secondary structures are formed by multiple polypeptide chains The two types of secondary structures are the alpha and beta pleated sheets

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Which of the following secondary structures would you expect to find on the surface of a globular protein? Alpha helix Beta sheet a, b, and c if the polar and charged amino acid side chains face the surface of the protein. Loops between two alpha-helices