Preparation - Tasks For Assessment - Class 9

14 Questions

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Preparation - Tasks For Assessment - Class 9


Questions and Answers
  • 1. 
    Enzymes are belong to which group of organic molecules?
    • A. 

      Carbohydrates

    • B. 

      Lipids

    • C. 

      Nucleic Acids

    • D. 

      Proteins

  • 2. 
    The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best at what temperature and pH?
    • A. 

      Temperature of 27oC and pH of 4.

    • B. 

      Temperature of 37oC and pH of 6.

    • C. 

      Temperature of 40oC and pH of 8.

    • D. 

      Temperature of 50oC and pH of 10.

  • 3. 
    What affect does extremely high pH have on enzymes?
    • A. 

      Denatures them

    • B. 

      Kills them

    • C. 

      Destroys them

  • 4. 
    What type of enzymes break down carbohydrates?
    • A. 

      Protease

    • B. 

      Lipase

    • C. 

      Carbohydrase

  • 5. 
    Please select the active site in the given image.
  • 6. 
    Write 2 differences between animal and plant cell.
  • 7. 
    Write 3 differences between prokaryotic and eukaryotic cell
  • 8. 
    Which of the following emulsifies fats so they can be further digested by the enzyme lipase?
    • A. 

      Hydrochloric acid

    • B. 

      Mucus

    • C. 

      Bile

    • D. 

      Saliva

  • 9. 
    Protease enzymes break down proteins into what?
    • A. 

      Fatty acids

    • B. 

      Amino acids

    • C. 

      Carboxylic acids

    • D. 

      Hydrochloric acid

  • 10. 
    Which enzyme converts starch into sugars in the mouth and small intestine?
    • A. 

      Protease

    • B. 

      Lipase

    • C. 

      Isomerase

    • D. 

      Amylase

  • 11. 
    Which enzyme converts fats into 3 fatty acids and glycerol?
    • A. 

      Amylase

    • B. 

      Protease

    • C. 

      Lipase

    • D. 

      DNA polymerase

  • 12. 
    Protease enzymes are located in which organ?
    • A. 

      Mouth

    • B. 

      Oesophagus

    • C. 

      Stomach

    • D. 

      Colon

  • 13. 
    Which of the following does not affect the initial rate of an enzyme controlled reaction?
    • A. 

      A change of pH

    • B. 

      An increase in the duration of the reaction

    • C. 

      A decrease in the concentration of substrate

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