Enzyme Quiz: Test Your Knowledge! Trivia

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  • 1/10 Questions

    Enzymes are usually ____________ in nature.

    • Carbohydrate
    • Fat
    • Iron
    • Protein
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About This Quiz

Dive into the Enzyme Quiz: Test your Knowledge! Trivia to explore the fascinating world of enzymes. Assess your understanding of enzyme nature, function, reactions, and specific conditions affecting their activity. Ideal for students preparing for advanced biology exams.

Enzyme Quiz: Test Your Knowledge! Trivia - Quiz

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  • 2. 

    What are the products formed from the breakdown of oil by lipase?

    • Amino acids

    • Fatty acids and glycerol

    • Glucose

    • Lipids

    Correct Answer
    A. Fatty acids and glycerol
    Explanation
    Lipase is an enzyme that breaks down lipids, such as oil, into their components. Fatty acids and glycerol are the products of this breakdown process. Therefore, when oil is broken down by lipase, it forms fatty acids and glycerol.

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  • 3. 

    According to the 'lock and key' hypothesis, what is represented by the lock and key?

    • The lock represents the enzyme while the key represents the substrate.

    • The lock represents the active site while the key represents the enzyme.

    • The lock represents the product while the key represents the substrate.

    • The lock represents the enzyme while the key represents the product.

    Correct Answer
    A. The lock represents the enzyme while the key represents the substrate.
    Explanation
    In the 'lock and key' hypothesis, the lock represents the enzyme while the key represents the substrate. This analogy suggests that the enzyme (lock) and substrate (key) have complementary shapes that fit together specifically. Just as a key can only fit into a specific lock, a substrate can only bind to a specific enzyme. This interaction between the lock (enzyme) and key (substrate) is essential for the enzyme to catalyze a specific chemical reaction.

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  • 4. 

    Which of the following statements regarding enzymes is NOT true?

    • A cell without ribosomes will not be able to produce enzymes.

    • An enzyme can still function if the shape of its active site is altered.

    • All enzymes are biological catalysts.

    • Enzyme action is affected by temperature and pH.

    Correct Answer
    A. An enzyme can still function if the shape of its active site is altered.
    Explanation
    The substrate cannot bind to an enzyme if the shape of the active site is altered.

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  • 5. 

    Under which conditions would salivary amylase act on a solution of starch most rapidly?

    • PH 2, 25°C

    • PH 2, 70°C

    • PH 7, 25°C

    • PH 7, 70°C

    Correct Answer
    A. pH 7, 25°C
    Explanation
    Enzymes denature at high temperatures. Optimum pH of salivary amylase is pH 7.

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  • 6. 

    Which of the following enzymes works well when it is mixed with distilled water?

    • Salivary amylase

    • Pancreatic amylase

    • Pepsin

    • Lactase

    Correct Answer
    A. Salivary amylase
    Explanation
    Salivary amylase works well when mixed with distilled water because it is an enzyme that breaks down carbohydrates, specifically starches, into simpler sugars. Salivary amylase is produced in the salivary glands and is present in saliva. When mixed with distilled water, it can effectively catalyze the hydrolysis of starch molecules into maltose and dextrin. This is because distilled water provides an optimal environment for the enzyme to function, without any interference from other substances that may inhibit its activity.

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  • 7. 

    Which of the following are characteristics of enzymes? 1.       Enzymes are highly specific. 2.       Enzymes remain unchanged at the end of their reactions. 3.       Enzymes are required in large amounts.

    • 1 and 2 only

    • 1 and 3 only

    • 2 and 3 only

    • All of the above.

    Correct Answer
    A. 1 and 2 only
    Explanation
    Enzymes can be used over and over again. Hence, only a small amount of enzyme is required to catalyze a large number of chemical reactions.

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  • 8. 

    Which of the following statements about enzymes is NOT correct?

    • Enzymes allow chemical reactions to take a shorter time to complete.

    • Enzymes are temperature sensitive.

    • Enzymes break down complex substances only.

    • Enzymes catalyse reversible reactions.

    Correct Answer
    A. Enzymes break down complex substances only.
    Explanation
    Some enzymes are involved in anabolic reactions.

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  • 9. 

    What is the enzyme found in potato that is able to react with hydrogen peroxide?

    • Amylase

    • Catalase

    • Lipase

    • Protease

    Correct Answer
    A. Catalase
    Explanation
    Catalase is the correct answer because it is an enzyme found in potato that is able to react with hydrogen peroxide. Catalase is responsible for breaking down hydrogen peroxide into water and oxygen, which helps protect the potato from oxidative damage. Amylase, lipase, and protease are enzymes that have different functions and are not involved in the reaction with hydrogen peroxide.

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  • 10. 

    Which of the following is NOT an example of an enzymatic reaction?

    • Break down of proteins into polypeptides in the duodenum

    • Curdling of milk in the stomach

    • Digestion of cellulose by bacteria

    • Emulsification of fats

    Correct Answer
    A. Emulsification of fats
    Explanation
    The breakdown of proteins into polypeptides in the duodenum involves proteases. Curdling of milk in the stomach involves the enzyme, rennin. Cellulose is digested by cellulase. Emulsification is a process whereby fats are broken down into tiny fat droplets (physical process).

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 07, 2014
    Quiz Created by
    MTLJL
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