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