Name: 26. Which of the following is true of the solubility of proteins in water?
ID: 205565 • Letter: N
Question
Name: 26. Which of the following is true of the solubility of proteins in water? a. Both fibrous and globular protcins are generally insoluble in water. b. Both fibrous and globular proteins are gencrally soluble in water c. Fibrous proteins are generally insoluble in water d. Globular proteins are generally insoluble in water 27. Which statement about the properties of a protein-prosein interaction is not true a. Reflects the composition of protein surfaces, rather than the protein core b. Enriched in hydrophobic residues, particularly in aromatic residues c. Protein-protein interaction interfaces are dynamic and frequently planar d. Exhibit both shape and electrostatic complementarity e. all of them are true 28. How many chiral carbons are present in the open-chain form of an aldopentose c. 4 d.5 29. When glucose adopts a pyranose structure which carbon is the anomerie carbon? a. C-l c. C-5 b. C-2 d. C-6 30. The cyclic structures of monosaccharides are which of the following? a, acetals b. hemiacctals e.ethers d. esters 31. Which of the following side chains are hydrophilbie? a. acidic b. basic c. polar but neutral d. all of these 32. Which of the following amino acids will exist as a -2 ion at very high pH? a. arginineb. glutamic acid c. isoleucine d. none of these 33. Which of the following is serylalanine? b. a. NH,-CH-C-NH-CH CH NHCHNILCH-CO CH CHOH d. c. -C-NH ,OHExplanation / Answer
26. Option C is correct.
Fibrous proteins are insoluble in water. Globular proteins are generally soluble in water.
27. Option E is correct.
All the given statements are true.
28. Option A is correct.
An aldopentose contains two chiral carbons.
29. Option A is correct.
C1 is the anomeric carbon in the pyranose structure of glucose.
30. Option B is correct.
Cyclic structures of monosaccharides are hemiacetals.
31. Option D is correct.
All the given options are hydrophilic.
32. Option B is correct.
Glutamate contains two carboxyl groups. Hence, it can exist in -2 state at very high pH.
33. Option D is correct.
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