What two functional groups are bound to the central carbon of every free amino acid monomer?

a. An R-group and a hydroxyl group

b. An N—H group and a (C═O) group

c. An amino group and a hydroxyl group

d. An amino group and a carboxyl group

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?

a. Hydroxyl

b. Carbonyl

c. Amino

d. Phosphate

Which of these functional groups is known to be used for storing large amounts of chemical energy?

a. Amino group

b. Carbonyl group

c. Phosphate group

d. Sulfhydryl group

Of the following functional groups, which is/are polar, tending to make organic compounds hydrophilic?

a. Carbonyl

b. Amino

c. Hydroxyl

d. All of the above

Which action could produce a carbonyl group?

a. The replacement of the —OH of a carboxyl group with hydrogen

b. The addition of a thiol to a hydroxyl

c. The addition of a hydroxyl to a phosphate

d. The replacement of the nitrogen of an amine with oxygen