SC.912.L.18.12.1. What is the most important inorganic compound for living things?
A. salt
B. water
C. milk
D. meat
SC.912.L.18.12.2. Which of the following is not a characteristic of water?
A. Water is a polar solvent
B. Water expands as it freezes
C. Water has a high boiling point
D. Water is made of one oxygen atom covalently bonded to two hydrogen atoms.
SC.912.L.18.12.3. The ability of water molecules to form hydrogen bonds with other water molecules is
critical to
A. evaporative cooling of skin surfaces
B. the milder temperatures of coastal regions when compared to inland areas
C. the ability of certain insects to walk on the surface of water
D. all of the above
SC.912.L.18.12.4. Which of the following accounts for the high temperature of evaporation of water?
A. Ionic bonds form between water molecules. These are the weakest type of bond and are
easier to break than the hydrogen bonds between water molecules.
B. Water has a low surface tension. This means that water molecules can easily break away from
other water molecules and evaporate at a lower temperature.
C. Many hydrogen bonds form between water molecules. As a result, more heat is needed for
water molecules to break away from solution and enter the air.
D. A, B, and C are all logical and chemically accurate explanations.
SC.912.L.18.1.1. What makes up all proteins?
A. sugars
B. amino acids
C. glycerol
D. glucose
SC.912.L.18.1.2. Which of the following are large, complex carbohydrates?
A. starches
B. sugars
C. lipids
D. oils
SC.912.L.18.1.3. What is the major type of nutrient found in potatoes?
A. nucleic acids
B. amino acids
C. proteins
D. carbohydrates
SC.912.L.18.1.4. What type of nutrient is starch?
A. carbohydrate
B. protein
C. fat
D. lipid
SC.912.L.18.1.5. Which of the following organic molecules is insoluble in water?
A. protein
B. sugar
C. carbohydrate
D. fat
SC.912.L.18.1.6. What are the structural parts of nucleic acids?
A. nucleotides
B. amino acids
C. peptides
D. polymers
SC.912.L.18.1.7. Basic units of organic compounds that are repeated over and over
are called
A. amino acids.
B. monomers.
C. nucleotides.
D. polymers.
SC.912.L.18.1.8. Which of the following choices does not properly pair an organic compound with one of
its building blocks (subunits)?
A. polysaccharide – monosaccharide
B. fat – fatty acid
C. nucleic acid – glycerol
D. protein – amino acid
SC.912.L.18.1.9. A new “wonder food” is being distributed by a rival company. The researchers in your
company determine that the “wonder food” contains only carbon, oxygen, and hydrogen. At this point,
the researchers
A. can say with certainty that the food is not made of proteins
B. can say with certainty that the food is not made of nucleic acids
C. can say that the food could only be a carbohydrate
D. A and B
SC.912.L.18.1.10. The glucose produced by a plant is used to make the carbohydrate, proteins, fats, and
nucleic acids of the plant. Which statement is true about the process of converting sugars into other
molecules?
A. Glucose contains all of the elements needed to produce these other compounds.
B. Glucose contains all of the elements needed to produce the carbohydrates, but other
elements must come from the soil if the plant is to produce fats, proteins, & nucleic acids.
C. Glucose contains all of the elements needed to produce the carbohydrates and fats, but other
elements must come from the soil if the plant is to produce proteins, & nucleic acids.
D. Glucose contains all of the elements needed to produce the carbohydrates and nucleic acids,
but other elements must come from the soil if the plant is to produce fats & proteins.
SC.912.L.18.1.11. Which of the following is not a correct statement?
A. carbohydrates are energy storing molecules composed of carbon hydrogen and oxygen in a
1:2:1 ratio
B. Lipids are energy storing molecules composed of carbon and hydrogen in a 1:2 ratio with very
little oxygen
C. Nucleic acids are structural, regulatory, or transport molecules composed of carbon,
hydrogen, oxygen, nitrogen, and phosphorus
D. Proteins are composed of carbon, hydrogen, oxygen, nitrogen, and sulfur containing
monomers called amino acids
SC.912.L.18.11.1. What kind of protein acts as a catalyst?
A. inhibitor
B. enzyme
C. sugar
D. lipid
SC.912.L.18.11.2. An unknown protein substance was placed in a solution and caused
a chemical reaction to occur. The reaction took place faster and at a
lower temperature than usual. What was the added substance?
A. A nucleic acid
B. A disaccharide
C. A lipid
D. An enzyme
SC.912.L.18.11.3. Why are enzymes important in digestion?
A. They allow reactions to occur rapidly and at body temperature.
B. They let reactions repeat without energy.
C. They control photosynthetic processes.
D. They change inorganic compounds into organic ones.
SC.912.L.18.11.4. Which of the following statements is not correctly matched?
A. enzyme
a protein that changes the rate of a chemical reaction
B. catalyst
a substance that changes the rate of a chemical reaction
C. substrate
a substance formed after an enzyme acts on a substance
D. product
a substance formed from changing reactants
SC.912.L.18.11.5. When an enzyme catalyzes a reaction,
A. it lowers the activation energy of the reaction
B. it raises the activation energy of the reaction
C. it becomes a product
D. it acts as a reactant