Enzyme practical activity quiz

Question 1

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

Accepted Answer

10

Answer

3

Answer

7

Answer

13

Question 2

Which of the following substances is the substrate for catalase?

Accepted Answer

Hydrogen peroxide

Answer

Water

Answer

Oxygen

Answer

Hydrochloric acid

Question 3

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

Accepted Answer

Trap the oxygen produced

Answer

Keep the glassware clean

Answer

To ensure a colour change

Answer

To maintain the pH

Question 4

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

Accepted Answer

40 million

Answer

40

Answer

40 thousand

Answer

40 billion

Question 5

What is the function of pH buffer?

Accepted Answer

To maintain the pH of a solution at a set value

Answer

To change the pH of a solution

Answer

To cause the enzyme to break down the hydrogen peroxide

Answer

To keep the temperature of the solution the same

Question 6

The function of a water bath is:

Accepted Answer

To maintain the temperature of a solution at a set value

Answer

To change the temperature of solutions

Answer

To maintain the pH of a solution

Answer

To cause the enzyme to break down the substrate

Question 7

What substance did you use to immobilise yeast cells?

Accepted Answer

Alginate

Answer

Algae

Answer

Agar

Answer

Jelly

Question 8

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

Accepted Answer

Calcium chloride

Answer

Sodium chloride

Answer

Magnesium chloride

Answer

Potassium chloride

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