The following statements are either true or false. Indicate which one using the

Question

The following statements are either true or false. Indicate which one using the following designations: A = True and B = False Individual hydrogen bonds in liquid water exist for many seconds and sometimes for minutes. Hydrophobic interactions are the driving force in the formation of micelles of amphipathic compounds in water. In an alpha helix, the R groups on the amino acid residues are stacked within the interior of the helix. Dissolved solutes alter some physical properties of the solvent water because they change the concentration of the water. Viruses are composed of nucleic acid surrounded by a polysaccharide shell. When pH = pka, the weak add and salt concentrations in a buffer are equal Proteins with different functions usually differ significantly in their amino acid composition. The Henderson-Hasselbalch equation relates the pH of a solution to the pKa and the concentrations of acid and salt. Unlike amide bonds, peptide bonds had the ability to rotate denaturing is partial or complete process of unwinding of a native structure

Explanation / Answer

True/False statements

a. Individual H-bonds in liquid water exist for many sconds and sometimes for minutes : False

b. Hydrophobic interactions are the driving force in the formation of micelles of amphiphatic compounds in water : True

c. In an alpha helix, the R groups on the amino acid residues are stacked within the interior of the helix : False

d. Dissolved solutes alter some physical properties of the solvent water becuase they change the concentration of the water : True

e. Viruses are composed of nucelic acid surrounded by a polysaccaride shell : False

f. When pH = pKa, the weak acid and salt concentration in a buffer are equal : True

g. Proteins with different functions usually differ significantly in their amino acid composiiton : True

h. The hendersen-Hasselbalck equation relates the pH of a solution to the pKa and the concentrations of acid and salt : True

i. Like amide bonds, peptide bonds has the ability to rotate : False

j. Denaturing is partial or complete process of unwinding of a native structure : True

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