John Loughlin
Quiz by , created 5 months ago

Quiz on Enzyme practical activity quiz, created by John Loughlin on 11/11/2019.

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John Loughlin
Created by John Loughlin 5 months ago
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  • Enzyme practical activity quiz

    Question 1 of 8

    1

    Which of the following is the optimum pH for catalase in celery?

    Select one of the following:

    • 3

    • 7

    • 10

    • 13

    Explanation

    Question 2 of 8

    1

    Which of the following substances is the substrate for catalase?

    Select one of the following:

    • Water

    • Oxygen

    • Hydrogen peroxide

    • Hydrochloric acid

    Explanation

    Question 3 of 8

    1

    Washing up liquid is necessary in the enzyme experiments in order to:

    Select one of the following:

    • Keep the glassware clean

    • Trap the oxygen produced

    • To ensure a colour change

    • To maintain the pH

    Explanation

    Question 4 of 8

    1

    How many molecules of hydrogen peroxide can catalase break down per second?

    Select one of the following:

    • 40

    • 40 thousand

    • 40 million

    • 40 billion

    Explanation

    Question 5 of 8

    1

    What is the function of pH buffer?

    Select one of the following:

    • To change the pH of a solution

    • To maintain the pH of a solution at a set value

    • To cause the enzyme to break down the hydrogen peroxide

    • To keep the temperature of the solution the same

    Explanation

    Question 6 of 8

    1

    The function of a water bath is:

    Select one of the following:

    • To change the temperature of solutions

    • To maintain the temperature of a solution at a set value

    • To maintain the pH of a solution

    • To cause the enzyme to break down the substrate

    Explanation

    Question 7 of 8

    1

    What substance did you use to immobilise yeast cells?

    Select one of the following:

    • Alginate

    • Algae

    • Agar

    • Jelly

    Explanation

    Question 8 of 8

    1

    What substance did you use to solidify the beads of immobilised yeast?

    Select one of the following:

    • Sodium chloride

    • Magnesium chloride

    • Potassium chloride

    • Calcium chloride

    Explanation