Thhs Bio- Enzyme Quiz

20 Questions | Total Attempts: 681

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Thhs Bio- Enzyme Quiz

Questions and Answers
  • 1. 
    Since light can speed up the rate at which hydrogen peroxide is broken down into water and oxygen, peroxide is kept in an opaque bottle. Light is therefore a catalyst. However, light is not an enzyme.
    • A. 

      True

    • B. 

      False

  • 2. 
    The enzyme and substrate in the Lock and Key Model depicted below
    • A. 

      Have a specific shape related to their interaction with each other

    • B. 

      Have a shape that can change slightly

    • C. 

      Meet up at the enzyme substrate corner

    • D. 

      Are not affected by denaturation of the enzyme

  • 3. 
    Check all of the choices below that are enzymes:
    • A. 

      Lipase

    • B. 

      Salivary amylase

    • C. 

      Pepsin

    • D. 

      Trypsin

    • E. 

      Lactase

    • F. 

      Luciferose

    • G. 

      Ribosome

  • 4. 
    Adding an acidic solution like orange juice to a bowl of cut-up apples will slow down the browning of the apples because
    • A. 

      The acidic solution contains hydrochloric acid which kills bacteria

    • B. 

      The acidic solution protects the apple

    • C. 

      The acidic solution denatures the enzyme which causes the apple to brown

    • D. 

      Choices A. and B.

  • 5. 
    A basic solution has a pH between 8-14. Since the pH of bleach is 13, it is considered a basic solution. 
    • A. 

      True

    • B. 

      False

  • 6. 
    An appropriate caption for this figure would be
    • A. 

      How Enzymes Work: The Lock and Key Model

    • B. 

      The Role of Temperature on Enzyme Action

    • C. 

      The Role of pH on Enzyme Action

    • D. 

      How Enzymes Function: The Induced Fit Model

  • 7. 
    The product shown below is a lactase substitute. Someone may take pills or a formula containing lactase if they 
    • A. 

      Do not have the lactase gene

    • B. 

      Have a mutated lactase gene

    • C. 

      Produce lactase that has a distorted shape

    • D. 

      All of the above

  • 8. 
    In the graph shown below, increasing the substrate concentration does not increase the rate of reaction at a certain point because
    • A. 

      All of the enzymes are occupied with substrates

    • B. 

      All of the enzymes have been denatured

    • C. 

      A and B

    • D. 

      None of the above

  • 9. 
    An enzyme uses hydrolysis to break down a complex carbohydrate. The products of the reaction will be
    • A. 

      Lipids

    • B. 

      Simple sugars

    • C. 

      Amino acids

    • D. 

      Nucleic acids

  • 10. 
    Why would trypsin, an enzyme that hydrolyzes proteins, denature if placed in the stomach? Check all that apply. 
    • A. 

      Trypsin functions best in a basic environment.

    • B. 

      The stomach has a higher temperature than the rest of the body.

    • C. 

      The stomach has an acidic environment.

    • D. 

      Pepsin competes with trypsin for substrates.

  • 11. 
    According to the induced-fit hypothesis, the active site of an enzyme
  • 12. 
    The molecules that enzymes combine with and convert into other molecules are called substrates.  
    • A. 

      True

    • B. 

      False

  • 13. 
    Which of the following enzymes would digest a fat?
    • A. 

      Protease

    • B. 

      Fatase

    • C. 

      Lactase

    • D. 

      Lipase

  • 14. 
    Enzymes influence chemical reactions in living systems by
    • A. 

      Providing the substrate required for the reaction to occur

    • B. 

      Affecting the rate at which reactions occur

    • C. 

      Absorbing water released when polymers are formed

    • D. 

      Combining with excess hydrogen to form gaseous wastes

  • 15. 
    Which group of organic compounds includes the enzymes?
    • A. 

      Proteins

    • B. 

      Starches

    • C. 

      Carbs

    • D. 

      Lipids

    • E. 

      Nucleic acids

  • 16. 
    The optimum temperature for the action of this enzyme is approximately
    • A. 

      15 C

    • B. 

      22 C

    • C. 

      37 C

    • D. 

      50 C

  • 17. 
    • A. 

      A molecule of oxygen

    • B. 

      An end product

    • C. 

      An organic catalyst

    • D. 

      The substrate

  • 18. 
    How will the rate of the reaction change if the temperature is raised to 50 degrees Cesius?
    • A. 

      The reaction rate will increase.

    • B. 

      The reaction rate will decrease.

  • 19. 
    In order for this firefly to produce light without heat, the following must be present:
    • A. 

      Oxygen, luciferase, and luciferose

    • B. 

      ATP and luciferase

    • C. 

      ATP, luciferase, oxygen

    • D. 

      Luciferase, oxygen, luciferin, ATP

  • 20. 
    Why do fireflies bioluminesce?
    • A. 

      To attract mates

    • B. 

      Because owl city says so

    • C. 

      Because of nothing

    • D. 

      To attract predators