What is an enzyme?
Catalyst
Protein catalyst
Carbohydrate catalyst
Lipid catalyst
All the energy in a living organism ultimately comes from the:
Air
Food
Water
Sun
Enzymes are:
Globular proteins
Fibrous proteins
Made of lipids
Made of carbohydrate
Which of the following is NOT an enzyme?
Amylase
Maltase
Amylose
Sucrase
Which of the following is NOT a catabolic enzyme?
Catalase
DNA polymerase
Which of the following is NOT an anabolic enzyme?
Potato phosphorlase
RNA polymerase
The pH level affects the rate of action of enzymes.
True
False
Catalase is an enzyme that breaks down:
Hydrogen peroxide
Starch
Protein
In carrying out the activity to investigate the effect of pH on the rate of the action of catalase, what factor was deliberately kept constant?
pH
Temperature
Amount of water
Amount of humidity
What was the optimum pH for the enzyme catalase?
2
7
9
Optimum activity means:
Conditions under which the enzyme does not work
Conditions under which the enzyme works very slowly
Conditions under which the enzyme works normally
Conditions under which the enzyme works best
Specificity of an enzyme means:
The way in which an enzyme acts on many substrates
The way in which an enzyme acts on only one substrate
The way in which an enzyme produces a product
The way in which an enzyme loses its function
In carrying out the activity to investigate the effect of temperature on the rate of the action of catalase, what factor was deliberately kept constant?
Heat
In carrying out the activity to investigate the effect of temperature on the rate of the action of catalase, how did you measure the rate of action of the enzyme?
Took note of the amount of enzyme used
Took note of the volume of bubbles produced per minute
Took note of the temperature changes that occurred
Took note of the pH changes that occurred
In carrying out the activity to immobilise an enzyme and examine its application, what substance did you use to immobilise the enzyme?
Agar
Malt agar
Skimmed milk agar
Alginate
In carrying out the activity to immobilise an enzyme and examine its application, what enzyme did you immobilise?
Lipase
Invertase
Potato phosphorylase
In carrying out the activity to immobilise an enzyme and examine its application, what was the difference between the product produced by the immobilised enzyme and the product produced by the free enzyme?
Immobilised enzyme product was kept behind; free enzyme product was allowed out
Immobilise enzyme product was pure; free enzyme product was cloudy
Immobilised enzyme product was cloudy; free enzyme product was pure
Immobilised enzyme product was allowed out; free enzyme product was kept behind
What are the substrate and product of invertase?
Substrate: sucrose; Products: glucose and fructose
Substrate: maltose; Product: glucose
Substrate: lactose; Products: glucose and galactose
Substrate: sucrose; Product: sucrase
Heat denaturation of an enzyme refers to:
The enzyme working at maximum rate
The enzyme working at an average rate
The enzyme losing its shape and function
The enzyme losing its substrates and products
Batch culture is:
Where a large amount of products is added over time and nutrients are produced over time
Where a large amount of nutrients is added over time and products are produced over time
Where a fixed amount of products is added and fixed amount of nutrients is produced
Where a fixed amount of nutrients is added and fixed amount of products is produced
Continuous-flow culture is:
Where products are added over time and nutrients are produced over time
Where a fixed amount of nutrients is added and a fixed amount of nutrients is produced
Where nutrients are added over time and products are produced over time
Where a fixed amount of products are added and a fixed amount of nutrient are produced
A bioreactor is:
A test tube in which biology experiments are carried out
A beaker in which biological reactions occur
A reactor in which living organisms carry out metabolism
A vessel in which a product is formed by a cell or cell component, such as an enzyme
