AP Bio Unit 2 (Proteins & Enzymes) Review

The presence in a protein of distinct subunits, like the four chains of hemoglobin, gives rise to which structure?

• Primary

• Secondary

• Tertiary

• Quaternary

A compound contains hydroxyl groups (OH^-) as its predominant functional group. Which of the following statements is TRUE concerning the compound?

• It is probably a lipid

• It should dissolve in water

• It should dissolve in a nonpolar solvent

• It won't form hydrogen bonds with water

Altering which of the following levels of structural organization of a protein could alter the function of an enzyme?

• Primary

• Secondary

• Tertiary

• A change to any of the three above could alter the function of an enzyme.

Primary structure of proteins is dependent upon which of the following?

• peptide bonds

• hydrogen bonds

• disulfide bonds

• ionic bonds

Upon analysis, a particular protein was found to contain 438 amino acids. How many peptide bonds are present in the protein?

• 437

• 219

• 438

• 876

The alpha helix portion of a polypeptide represents the:

• primary structure

• secondary structure

• tertiary structure

• quaternary structure

The portion of the diagram labelled 'A' is which of the following functional groups?

• aldehyde

• ketone

• carboxyl

• amine

When dehydration synthesis occurs, what will the result be for the reactants?

• a lipid

• a dipeptide

• a monosaccharide

• a polysaccharide

The portion of the diagram labeled "B"

is which of the following functional groups?

• aldehyde

• ketone

• carboxyl

• amine

Which type of bond is formed when dehydration synthesis occurs at “C” and produces the molecule on the bottom of the (II) diagram?

• ionic bond

• hydrogen bond

• peptide bond

• glycosidic bond