which of the following is correct about protein hydration? a- hydrophobic pathces are hydrated first followed by exposed polar side chains. b- the monolayer water that hydreates proteins are those that hydrate ionic, polar, and nonpolar amino acids on the surface of the protein c- polar amino acids are the first hydrated followed by ionic aminio acids d- hydration of hydrophoic patches in proteins is not possible

Match each of the statements below with the fibrous protein that mostly fits the description. Coiled-coil of alpha helices V [ Choose] Collagen Silk fibroin Keratin Triple helical arrangement of polypeptide chains Extended anti-parallel beta sheets [ Choose ] Characterized by a predominant (GSGAGA)n repeat in the primary seguence [ Choose] Found in hair, feathers, scales, and nails [ Choose ] Is produced by insects and spiders [ Choose ] The sequence Gly-Pro-Hyp occurs frequently in this fibrous protein [ Choose ] Is characterized by the heptad pseudo- [ Choose ] repeat Major component of skin, tendons, ligaments and teeth [ Choose ] Characterized by regular inter-sheet spacing [ Choose ] of 0.35 and 0.57 nm

Which of the following is the primary driving force for protein folding? disulfide bridges internal hydrogen-bonds the hydrophobic effect Van der Waals forces O salt bridges

Which of the following is true regarding proteins A. Absorbance of proteins is directly proportional to the molecular weights B.Proteins react with biuret reagent because of their side chains C. two out of the twenty amino acids can absorb at 280nm D. In proteins the average weight per amino acid residue always varies

Which of the following is true about the relative position of hydrophilic and hydrophobic amino acids in globular protein structures in aqueous solutions? Hydrophobic amino acids tend to be found in the core, while hydrophilic amino acids tend to be on the outer surface of proteins. Hydrophilic amino acids tend to be found in the core, while hydrophobic amino acids tend to be on the outer surface of proteins. There is an even distribution of hydrophobic and hydrophilic amino acids between the inner core and outer surface of proteins. There is no predictable distribution of hydrophilic and hydrophobic amino acids; it depends on the specific protein

Consider a mixture comprised of the proteins attached: Protein that will most strongly bind to an anion exchange column? Protein that will elute first in gel filtration chromatography? Protein that will elute last in hydrophobic interaction chromatography? Protein that will elute last in carbohydrate containing column?

Which of the following statements is TRUE? O Urea disrupts primary protein structure Trace amounts of BME fully reduce oxidized proteins Oxygen reduces oxidized proteins None of these options is true

Select two molecules that could be found in a protein, and from the two molecules, are they lower or higher numbered amino acids and would they be acidic, basic, polar, or nonpolar?

In an experiment, a 0.001 (mole fraction) solution of polysaccharide in water is made and is placed in the compartment A.  Compartment B is filled with pure water.  The two compartments are separated by a porous semi-permeable membrane that allows the exchange of water molecules between the two compartments, but not that of the larger polysaccharide molecules.  part 1: Show that the chemical potential of water in compartment A is lower than that in compartment B by 2.48 J/mol.

Three proteins with an overall charges of 0, -5, and -8 are passed through an anion exchange column equilibrated in a buffer with low ionic strength and eluted with an increasing gradient of salt in a buffer. Which protein will elute last from the column? 1. Protein with no charge. 2. Protein with eight negative charges. 3. Protein with five negative charges. 4. Both charged proteins will elute at the same time.