Choose ONE of the bond types listed below which most accurately describes the bonds involved in stabilization of the quaternary structure of IgG: Question 17 options: hydrogen bonds covalent bonds van der Waals interactions hydrophobic interactions ionic interactions
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Choose ONE of the bond types listed below which most accurately describes the bonds involved in stabilization of the quaternary structure of IgG:
Question 17 options:
|
|
hydrogen bonds |
|
|
covalent bonds |
|
|
van der Waals interactions |
|
|
hydrophobic interactions |
|
|
ionic interactions |
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- Define the following terms: a. phosphoryl group transfer potential b. adenosine c. adenosine monophosphate d. high-energy bond e. resonance hybridWhich of these statements about hemoglobin is NOT true? A) it is a tetrameric globular protein b) it has a prosthetic group called heme c) it’s dominant motif is beta barrel d) its dominant motif is helix-turn-helix The reagent used to break disulfide bonds is: a) urea b) beta-mercaptoethanol c) guanidine hydrochloride d) phosphorus pentachlorideYour protein has a pI of 8.34 and is in a pH 7 buffer. Which of the chromatographs below would you use to purify it. * a) cation exchange b) anion exchange c) hydrophobic interaction d) reverse phase
- At what level of protein structure does each of the following denaturation act? a. heat b. strong acid c. saturated salt solution d. organic solvents (e.g., alcohol or chloroform)A mixture of proteins contains four different polypeptides, all in ~equal concentration, in solution with the following properties: Protein Molecular Mass (kDa) Isoelectric point A 45 4.5 B 77 6.0 C 28 4.1 D 14 10.7 A fraction of the protein solution is applied to a strong cation exchange column using a buffer at pH 8.0 with increasing [NaCl] from 0.05 M – 1.0 M. The chromatogram is shown below: 1. Based on the data presented, which of the following statements is true: Peak #1 is protein D Peak #4 is protein C Peak #3 is protein A Peak #4 is protein D Peak #2 is protein B 2. Since you know that the proteins are all present in approximately equal concentrations, the different relative peak areas tell you that: There are more neutral amino acids in protein #4…Which of the following amino acids would be most soluble in water? Group of answer choices glycine at pH 8 proline at pH 6 valine at pH 1 leucine at pH 4 alanine at pH 7
- Draw the structure of each of the following tripeptides:(a) Lysine-phenylalanine-threonine(b) Alanine-leucine-valine with the charges that exist in cell fluidWhich of the following are involved in protein secondary structure? select one or more : a. van der waal forces b. Disulfide bridges c. Hydrogen bonds d. Peptide bondsIs captopril, the molecule shown, a polar or nonpolar molecule? Explain your choice using information in the diagram for support.
- Which of the following factor(s) may contribute to the stability of folded protein structures? Disulfide bonds. Hydrophobic effect. Electrostatic interactions. Hydrogen bonds. All of the above.What structures are found in sterol molecules Select one: a. Waxes b. Double helixes c. Molecular rings d. ProteinsWhich of the following are nitrogenous bases with the general structure shown in the picture? a.cytosine b.uracil c.thymine d.adenine e.guanine