AP Bio Chemistry of Life

amino

A chemist wishes to make an organic molecule less acidic. Which of the following functional groups should be added to the molecule in order to do so?

polar covalent bonds

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by

C and D

Which functional group(s) shown in figure 3.4 is (are) present in all amino acids?

NaCl crystals will dissolve readily in water but will not dissolve in methanol

You have two beakers. One contains pure water, the other contains pure methanol (wood alcohol). The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules. You pour crystals of table salt (NaCl) into each beaker. Predict what will happen.

positively charged

based on your knowledge of the polarity of water molecules, the solute molecule depicted in figure 2.9 is most likely.

10

how many molecules of water are needed to completely hydrolyze a polymer that is 11 monomers long?

proteins

if cells are grown in a medium containing radioactive 35S, which of these molecules will be labeled?

unique three-dimensional shape of the fully folded polypeptide.

the tertiary structure of a protein is the

steroid molecule

what is the structure shown in figure 3.10?

carboxyl

which chemical group can act as an acid?

dehydration reactions assemble polymers, and hydrolysis reactions break down polymers.

which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

a nitrogenous base, a phosphate group, and a pentose.

which of the following descriptions best fits the class of molecules known as nucleotides?

hydrogen bond

which of the following explains most specifically the attraction of water molecules to one another?

triglyceride/phospholipid bilayer

which of the following is NOT a monomer/polymer pairing?

they have multiple double bonds in the carbon chains of their fatty acids.

which of the following statements concerning saturated fats is NOT true?

it results in a peptide bond

which of the following statements is true regarding the chemical reaction illustrated in figure 3.11?

hydrogen bonds

which type of interaction stabilizes the a helix and the B pleated sheet structure of proteins?

hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water

why does ice float in water?