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Which of the following is the optimum pH for catalase in celery?
13
10
7
3
Which of the following substances is the substrate for catalase?
Hydrogen peroxide
Hydrochloric acid
Water
Oxygen
Washing up liquid is necessary in the enzyme experiments in order to:
Keep the glassware clean
To ensure a colour change
Trap the oxygen produced
To maintain the pH
How many molecules of hydrogen peroxide can catalase break down per second?
40
40 thousand
40 billion
40 million
What is the function of pH buffer?
To cause the enzyme to break down the hydrogen peroxide
To maintain the pH of a solution at a set value
To change the pH of a solution
To keep the temperature of the solution the same
The function of a water bath is:
To maintain the temperature of a solution at a set value
To change the temperature of solutions
To cause the enzyme to break down the substrate
To maintain the pH of a solution
What substance did you use to immobilise yeast cells?
Algae
Alginate
Agar
Jelly
What substance did you use to solidify the beads of immobilised yeast?
Potassium chloride
Calcium chloride
Magnesium chloride
Sodium chloride