EBIO 1210: TEST 2:BIOMOLECULES AND LIPIDS: QUESTIONS
AND ANSWERS
1) Name the three components of phospholipids -- Answer ✔✔ A phosphate group, a
glycerol, and fatty acids
2) How many molecules of water are needed to completely hydrolyze a polysaccharide
that is 10 monomers long? -- Answer ✔✔ 9
3) How can you differentiate the molecular formulas for saturated and unsaturated fats?
-- Answer ✔✔ Saturated fats lack double bonds, have the maximum number of
hydrogens available, and are molecularly straight.
4) Besides "jumpstarting" production of sex hormones, what other function does
cholesterol serve in animals? -- Answer ✔✔ Cholesterol is an important component
of animal cell membranes
5) Why are the vertebrate sex hormones estradiol and testosterone considered to be
lipids? -- Answer ✔✔ Their carbon skeletons are composed of primarily C-C and C-
H bonds
6) A food company wishes to convert corn oil into a spread that is solid at room
temperature. One way to accomplish this goal would be to:
A) Add hydrogens, increasing the number of double bonds in the oil
molecules.
B) Add hydrogens, decreasing the number of double bonds in the oil
molecules.
AND ANSWERS
1) Name the three components of phospholipids -- Answer ✔✔ A phosphate group, a
glycerol, and fatty acids
2) How many molecules of water are needed to completely hydrolyze a polysaccharide
that is 10 monomers long? -- Answer ✔✔ 9
3) How can you differentiate the molecular formulas for saturated and unsaturated fats?
-- Answer ✔✔ Saturated fats lack double bonds, have the maximum number of
hydrogens available, and are molecularly straight.
4) Besides "jumpstarting" production of sex hormones, what other function does
cholesterol serve in animals? -- Answer ✔✔ Cholesterol is an important component
of animal cell membranes
5) Why are the vertebrate sex hormones estradiol and testosterone considered to be
lipids? -- Answer ✔✔ Their carbon skeletons are composed of primarily C-C and C-
H bonds
6) A food company wishes to convert corn oil into a spread that is solid at room
temperature. One way to accomplish this goal would be to:
A) Add hydrogens, increasing the number of double bonds in the oil
molecules.
B) Add hydrogens, decreasing the number of double bonds in the oil
molecules.
