BioChemistry Test

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+        CO32–        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 pKa 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 pKa of the ethylammonium ion

H2CO3        CO32-        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 Keq for the reaction to the right.        the Keq for the reaction to the left.        the Keq for the dissociation of an acid.        the pH of a very weak solution.