Module 6 Test

Biological buffers work to keep pH in your body in a range of ___. Mark only one oval.

• 6.5 – 7.5

• 7.5 – 8.5

• 4.5 – 5.5

• 5.5 – 6.5

Which macromolecule is involved in nearly every function in the human body? Mark only one oval.

• protein

• carbohydrate

• lipid

• nucleic acid

Which macromolecule is responsible for the formation of a cell's membrane? Mark only one oval.

• protein

• carbohydrate

• lipid

• nucleic acid

Two atoms of uranium that differ in their number of neutrons are called

• Neutrons

• Electrons

• Protons

• Isotopes

Ammonia is a compound that forms OH- (hydroxide) ions when it is dissolved in water; it is a

• Acid

• Base

• Neutral

• Compound

What type of mixture is salt water? Mark only one oval.

• homogeneous

• heterogeneous

Enzymes are not specific. Mark only one oval.

• True

• False

Covalent bonds __________ ________________ Mark only one oval.

• Share electrons

• Take electrons

• Form ionic compounds

• Conduct electricity

Ionic bonds __________ __________________

• Share electrons

• Take electrons

Endothermic Reactions ________ energy, and feel ________ to the touch

• Release, hot

• Absorb, cold

• Release, cold

• Absorb, hot