Quiz  /  Enzymes

  • 1. 
    Enzymes are special types of:

  • Both a and b
  • Proteins
  • Catalysts
  • Organelles

  • 2. 
    Enzymes change the ______ of a chemical reaction.

  • Reactants
  • Rate
  • Type
  • Product

  • 3. 
    True or False: Enzymes are designed for very specific chemical reactions.

  • FALSE
  • TRUE

  • 4. 
    Where does the reaction between the enzyme and the substrate take place at?

  • Activator
  • Substrate
  • Inhibitor
  • Active Sight

  • 5. 
    The new molecules or substances released by the enzyme are called:

  • Substrate
  • Activator
  • Product
  • Active Sight

  • 6. 
    What is the name of the molecule or substance that the enzyme reacts with?

  • Substrate
  • Inhibitor
  • Activator
  • Active Sight

  • 7. 
    True or False: The lower the temperature, the faster the reaction at the enzyme will occur.

  • TRUE
  • FALSE

  • 8. 
    A higher ______ can increase the reaction rate.

  • Concentration of enzyme or substrate
  • Number of inhibitors
  • pH
  • All of the Above

  • 9. 
    Which of the following pH levels will most likely NOT affect enzyme activity?

  • 3
  • 2 (very low pH)
  • 12
  • 7

  • 10. 
    What are inhibitors?

  • Molecules that replace enzymes
  • Molecules that speed up enzymes
  • Molecules that make enzymes
  • Molecules that slow down or stop enzymes

  • 11. 
    Macromolecule chitin is

  • a simple polysaccharide
  • sulphur containing polysaccharide
  • phosphorous containing polysaccharide
  • nitrogen containing polysaccharide

  • 12. 
    The nature of an enzyme is

  • Lipid
  • Vitamin
  • Carbohydrate
  • Protein

  • 13. 
    In alcoholism, this enzyme is elevated

  • acid phosphatase
  • hepatitis
  • serum glutamate pyruvate transaminase
  • glutamyl transpeptidase

  • 14. 
    With regards to enzyme action, this statement is incorrect

  • Malonate is a competitive inhibitor of succinic dehydrogenase
  • the substrate binds with the enzyme at its active site
  • the non-competitve inhibitor binds the enzyme at a site distinct from that binding the substrate
  • addition of a lot of succinates does not reverse the inhibition of succinic dehydrogenase by malonate

  • 15. 
    What is the count of genes that determine the synthesis of one enzyme?

  • One
  • Four
  • Eight
  • Sixteen

  • 16. 
    This enzyme was first isolated and purified in the form of crystals

  • Urease
  • pepsin
  • Amylase
  • Ribonuclease

  • 17. 
    Enzyme-driven metabolic pathways can be made more efficient by

  • grouping enzymes into multienzyme free-floating complexes
  • concentrating enzymes with specific cellular compartments
  • fixing enzymes into membranes so they are adjacent to each other
  • all of these

  • 18. 
    Tryptophan synthetase of

  • a protein A and one subunit A
  • a protein designated A
  • two proteins designated A and B
  • a protein designated B

  • 19. 
    This statement about enzymes is true

  • enzymes accelerate reactions by lowering the activation energy
  • enzymes are proteins whose three-dimensional form is key to their function
  • enzymes do not alter the overall change in free energy for a reaction
  • all of these

  • 20. 
    The enzyme COX-1 is vital for human health in this way:

  • it is a chemical derivative of aspirin
  • catalyzes the hormone-production which maintains the stomach lining
  • critical for the biosynthesis of DNA
  • helps in the transportation of carbon dioxide in the blood
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