1. A level of the hierarchy of life between organ and community:
a. Tissue
b. Cell
c. Ecosystem
d. Population

2. 2. The electrical charge of electrons is:
a. positive
b. negative
c. neutral
d. positive when the atom is an ion

3. 3. Not characteristic of all organic compounds from nature:
a. synthesized by cells
b. carbon-based
c. include a hydroxyl functional group
d. include covalent bonds

4. 4. Which of the following is not constructed according to
the fluid-mosaic model?
cytoplasm
plasma membrane
c. nuclear membrane
d. endoplasmic reticulum

5. 5. During passive transport, molecules always:
move toward higher concentrations
move toward lower concentrations
c. are at equilibrium across a cellular membrane
d. enter but do not exit cells

6. 6. Can not be broken down by chemical means:
a. molecules
b. proteins
c. chemical elements
d. bacteria

7. 7. Not a simple sugar:
Starch
glucose
c. Fructose
d. monosaccharide

8. 8. Organelle used for temporary storage of food or wastes:
nucleus
mitochondrion
c. vacuole
d. endoplasmic reticulum

9. 9. Solutes become evenly distributed in solutions because of:
air pressure
Brownian motion
c. Gravity
d. facilitated diffusion

10. 10. Subatomic particles (electrons, protons, etc) that have the
same electrical charge repel one another:
a. true
b. false

11. 11. Polysaccharide is a term applied to:
a. simple sugars
b. starches
c. proteins
d. lipids (fats)

12. 12. The soupy fluid within Eukaryotic cells:
cytoplasm
cilia
c. flagella
d. cytoskeleton

13. 13. Diffusion of molecules across a biological membrane requires
cells to expend energy:
a. true
b. false

14. 14. The tails of phospholipids are hydrophobic:
True
false

15. 15. Solute molecules in a hypertonic solution are relatively:
more active
low in concentration
c. high in concentration
d. isotonic