butane < butanoic acid < pentane
       butane < pentane < butanoic acid
       butanoic acid < pentane < butane
       pentane < butanoic acid < butane

       1.1 x 10^-7
       2.3 x 10⁷
       6.7 x 10²
       8.3 x 10^-2

       NH₂^-
       NH₄⁺
       HNO₃
       H₃O⁺

       7.50 mL
       50.0 mL
       66.7 mL
       37.5 mL

       membranes can move like a fluid.
       proteins are embedded into the cell membrane.
       materials that are fluid move across a membrane.
       the composition of membranes includes a mosaic fluid

       hydroxyl -2,4-dichlorocyclohexene
       3,4-dichlorophenol
       2,4-dichlorophenol
       1,3-dichlorophenol

       H₂CO₃
       H₂O
       H₃O⁺
       HCO₃^-

       2
       3
       4
       more than 5

       nonpolar
       polar-acidic
       polar-basic
       polar-neutral

       progesterone
       thromboxane
       cortisol
       testosterone
 
51.Which is an α-amino acid?
 
*a) 
b) 
c) 
d)

       Na⁺
       CO₃^­2-
       Al³⁺
       Cl^-

       primary
       secondary
       tertiary
       quaternary

       2.34
       4.54 x 10^-3
       11.66
       8.42

       tertiary structure
       primary structure
       secondary structure
       quaternary structure

       2.90
       7.00
       11.1
       3.10
       10.9

       1.9 x 10^-6 M
       5.7 M
       1.0 x 10^-14 M
       9.8 x 10^-9 M

       iron
       sulfur
       nitrogen
       carbon

       there is much more acetic acid than acetate ion
       there is more acetate ion than acetic acid
       the concentration of acetate ion is equal to that of acetic acid
       the pH is lower than pK_a of acetic acid

       alkanes contain polar bonds
       alkanes are attracted to one another by London forces
       alkanes are polar molecules
       alkanes are unsaturated hydrocarbons

       a phosphate group, glycerol, three fatty acids, and a sugar molecule.
       a phosphate group, glycerol, two fatty acids, and an alcohol molecule.
       a phosphate group, a cyclic carbon ring, and variable numbers of fatty acids.
       a phosphate group, a carbohydrate molecule, an alcohol, and fatty acids.

       More ions exist than water molecules.
       The majority of the molecules present are in the form of H₂O.
       The amount of water is the same as the amount of the ions present.
       There will always be more hydronium ions present than water at equilibrium.

       1
       2
       3
       4

       To interrupt the production of prostaglandins from arachidonic acid.
       To interfere with the production of anabolic steroids.
       To facilitate the production of cyclooxygenase.
       To stimulate the production of leukotrienes.

       pH = 0.5
       pH = 3.0
       pH = 2.7
       pH = 500

       primary
       secondary
       tertiary
       quaternary

       ethylammonium ion predominates
       ethylamine predominates
       the concentration of ethylamine equals that of ethylammonium ion
       the pH is higher than pK_a of the ethylammonium ion

       H₂CO₃
       CO₃^2-
       CO₂
       H₃O⁺

       have a pH greater than 7.0 and be basic.
       have a pH less than 7.0 and be basic.
       have a pH greater than 7.0 and be acidic.
       have a pH less than 7.0 and be acidic.

       The concentration of reactants is greater than the concentration of the products.
       The concentration of products is the same as the concentration of reactants.
       The concentration of the products is greater than the concentration of the reactants.
       Relative composition of reaction mixture cannot be predicted.

       peptide
       oligopeptide
       polypeptide
       centapeptide

       soap solution
       vinegar solution
       baking soda
       household ammonia

       the solution would turn litmus red.
       the solution would have a slippery feel to it.
       the solution would have a sour taste.
       the solution would dissolve some metals.

       3, 4-Dimethylpentane
       2,3-Dimethyl heptane
       2,3-Dimethylpentane
       1,1,2-Trimethylpentane

       the pH of a very weak solution.

       the K_eq for the reaction to the right.
       the K_eq for the reaction to the left.
       the K_eq for the dissociation of an acid.