1. Which of the following is NOT an organic molecule found in living organisms?
  2. Glucose (C6H12O6)
  3. Water (H2O)
  4. Proteins
  5. Nucleic acids
  1. What factor may influence enzyme activity?
  2. Product
  3. Pressure
  4. Temperature
  5. Oxygen level
  1. Complex or large molecules are formed by joining together ______.
  2. Polymers
  3. Carbohydrates
  4. Macromolecules
  5. Monomers
  1. Which organic molecule is used for long term energy storage, to make part of the cell membrane and provides insulation and water-proofing?
  2. Carbohydrates
  3. Lipids
  4. Proteins
  5. Nucleic acids
  1. Proteins are polymers formed from joining together ______.
  2. Amino acids
  3. Nucleic acids
  4. Carbohydrates
  5. Lipids
  1. Which of the following molecules is made up of glycerol and fatty acids?
  2. Lipids
  3. Proteins
  4. Starches
  5. Nucleic acids
  1. Which word listed below does not belong?
  2. DNA
  3. Starch
  4. Glucose
  5. Polypeptide
  1. What is the function of proteins as an organic molecule?
  2. Quick energy and to build structures
  3. Stores genetic information and helps make proteins
  4. Makes muscles, enzymes and hormones.
  5. Long term energy storage, part of cell membranes and provides insulation and water-proofing.
  1. Which organic compounds share a monomer to polymer relationship?
  2. Polypeptides to proteins
  3. Nucleotides to nucleic acids
  4. Sugar to glucose
  5. Fatty acids to polysaccharides

Use the following diagram to answer the next two questions.


  1. Which enzyme has a maximal activity in the neutral range?
  2. Urease
  3. Glycine oxidase
  4. Amylase
  5. Pepsin
  1. Which enzyme breaks down at a pH of 3 and higher?
  2. Urease
  3. Glycine oxidase
  4. Amylase
  5. Pepsin
  6. Changing the temperature and pH can change the shape of an enzyme. How might this affect the function of the enzyme?
  7. The enzyme would keep the reaction constant.
  8. The substrate would bind to the new active site shape.
  9. The enzyme would speed up the reaction.
  10. The enzyme would not speed up the reaction.
  1. An enzyme speeds up a reaction by
  2. Raising the activation energy.
  3. Lowering the activation energy.
  4. Absorbing the energy
  5. Releasing the energy.
  6. What is the role of a pH buffer?
  7. Maintain homeostasis by keeping pH constant
  8. Break down an enzyme
  9. Decrease pH
  10. Increase pH
  11. What type of organic compound is DNA?
  12. Protein
  13. Nucleic acid
  14. Carbohydrate
  15. Lipid

Use the picture below to answer the next two questions.

  1. Which structure represents the active site of the enzyme?
  2. Structure A
  3. Structure B
  4. Structure C
  5. Structure D
  6. Which structure is the substrate of the chemical reaction?
  1. Structure A
  2. Structure B
  3. Structure C
  4. Structure D
  1. As part of the digestive process, the human stomach produces hydrochloric acid, HCl. Sometimes excess acid causes discomfort. In such a case, what substance would a person take to reduce the amount of acid in the stomach?
  2. Water (neutral)
  3. Lemon juice (acid)
  4. Magnesium hydroxide (base)
  5. Catalase (enzyme)
  6. What type of compounds end with the suffix –ose?
  7. Sugars
  8. Fatty acids
  9. Amino acids
  10. Nucleotides
  11. What organic compound was found as a result of the Miller Urey experiment?
  12. Amino acids
  13. Water
  14. Methane
  15. Ammonia
  1. Iodine is an indicator for ______, while Benedict’s is an indicator for ______.
  2. Starch, glucose
  3. Starch, protein
  4. Glucose, protein
  5. Glucose, starch
  1. Which is not one of the four main classes of biological molecules?
  2. Lipids
  3. Proteins
  4. Vitamins
  5. Nucleic acids
  6. Lipase, DNA helicase and salivary amylase are all examples of
  1. Lipids
  2. Enzymes
  3. Nucleic acids
  4. Sugars
  1. Which organic compound is correctly matched with the monomer that composes it?
  1. Lipid - monosaccharides
  2. Protein – amino acid
  3. Carbohydrate – starch
  4. Nucleic acid – amino acid
  1. What type of bond joins amino acids together in a protein?
  1. Covalent bond
  2. Hydrogen bond
  3. Peptide bond
  4. Ionic bond
  1. At high temperatures, the rate of enzyme action decreases because the increased heat
  1. Changes the pH of the system
  2. Neutralizes acids and bases in the system
  3. Alters the active site of the enzyme
  4. Increases the concentration of the enzyme
  1. An enzyme that breaks down a protein will not act upon starch. This fact is an indication that enzymes are
  1. Hydrophobic
  2. Catalytic
  3. Hydrophilic
  4. Specific
  1. Which pH below represents a weak base?
  1. 2.5
  2. 6.5
  3. 7.5
  4. 9.5