4. Biomolecules

Which of the following functional groups is present in all amino acids?

Which of these is found in all amino acids?

Ethanol, propanol, and methanol are three simple alcohols. They can be grouped together because they __________.

Which of the following molecules has a carboxyl functional group?

Which of the following functional groups increases the solubility of organic compounds in water?

Which of the following examples best describes a unique functional property of the carboxyl group?

Which of the following functional groups is associated with a release of energy when removed from the carbon skeleton with water?

Which functional group would you predict is part of abscisic acid?

Which of these is a thiol?

Which of the following groups is capable of hydrogen bonding with an oxygen atom on another functional group?

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

VISUAL SKILLS Which functional group is not present in this molecule?

a. carboxyl b. sulfhydryl c. hydroxyl d. amino

MAKE CONNECTIONS 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

Circle and name the functional groups in this organic molecule. What type of compound is this? For which class of macromolecules is it a monomer?