1. Nonliving entities would NOT possess

a. energetic interactions.
b. DNA.
c. atoms.
d. elements.
e. any of these

2. The conversion of solar energy to chemical energy is known as

a. metabolism.
b. photosynthesis.
c. chemosynthesis.
d. catabolism.
e. anabolism.

3. The atomic number is determined by the number of

a. neutrons and protons.
b. neutrons and electrons.
c. protons and electrons.
d. protons only.
e. neutrons only.

4. Which compound is hydrophobic?

a. ethyl alcohol
b. simple sugar
c. hydrocarbon
d. glycerol
e. amino acid

5. Cellulose is

a. a material found in cell walls.
b. a component of cell membranes.
c. a plant protein.
d. formed by photosynthesis.
e. the most complex of the organic compounds.

6. If a cell did not have ribosomes, it would be unable to

a. extract energy from glucose.
b. synthesize glucose.
c. store food in the form of fat.
d. form proteins.

7. Which of the following are the primary structures for the packaging of cellular secretions for export from the cell?

a. Golgi bodies
b. ribosomes
c. mitochondria
d. lysosomes
e. endoplasmic reticula

8. Hydrophobic reactions of phospholipids can produce clusters of their fatty acid tails to form

a. a lipid bilayer.
b. hydrolysis of the fatty acids.
c. a protein membrane.
d. a cytoskeleton.
e. a nonpolar membrane.

9. Which of the following statements is NOT true?

a. A lipid bilayer is characteristic of all membranes.
b. Cellular organelles are associated with membranes.
c. In a plasma membrane, the hydrophilic portion is oriented to the outside of the cell.
d. Lipid molecules make the cell membrane relatively impermeable to water.
e. Even under extremely high magnification, an electron microscope cannot reveal the substructure of cell membranes.

SELECTING THE EXCEPTION

10. Four of the five answers listed below are acidic (pH below 7). Select the exception.

a. vinegar
b. soft drink
c. soap
d. lemon juice
e. beer

11. Four of the five answers listed below are lipids. Select the exception.

a. triglyceride
b. wax
c. butter
d. insulin
e. steroid

12. Four of the five answers listed below are related by energy requirements. Select the exception.

a. water potential
b. osmosis
c. bulk flow
d. active transport
e. diffusion