6950765
Descrição
Quiz por John Loughlin, atualizado more than 1 year ago
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Criado por John Loughlin
aproximadamente 8 anos atrás
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Questão 1
Questão
What is an enzyme?
Responda
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Catalyst
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Protein catalyst
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Carbohydrate catalyst
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Lipid catalyst
Questão 2
Questão
All the energy in a living organism ultimately comes from the:
Responda
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Air
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Food
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Water
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Sun
Questão 3
Questão
Enzymes are:
Responda
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Globular proteins
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Fibrous proteins
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Made of lipids
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Made of carbohydrate
Questão 4
Questão
Which of the following is NOT an enzyme?
Responda
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Amylase
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Maltase
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Amylose
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Sucrase
Questão 5
Questão
Which of the following is NOT a catabolic enzyme?
Responda
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Amylase
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Catalase
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DNA polymerase
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Sucrase
Questão 6
Questão
Which of the following is NOT an anabolic enzyme?
Responda
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Potato phosphorlase
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Sucrase
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DNA polymerase
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RNA polymerase
Questão 7
Questão
The pH level affects the rate of action of enzymes.
Responda
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True
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False
Questão 8
Questão
Catalase is an enzyme that breaks down:
Responda
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Water
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Hydrogen peroxide
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Starch
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Protein
Questão 9
Questão
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?
Responda
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pH
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Temperature
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Amount of water
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Amount of humidity
Questão 10
Questão
What was the optimum pH for the enzyme catalase?
Responda
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2
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7
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9
Questão 11
Questão
Optimum activity means:
Responda
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Conditions under which the enzyme does not work
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Conditions under which the enzyme works very slowly
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Conditions under which the enzyme works normally
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Conditions under which the enzyme works best
Questão 12
Questão
Specificity of an enzyme means:
Responda
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The way in which an enzyme acts on many substrates
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The way in which an enzyme acts on only one substrate
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The way in which an enzyme produces a product
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The way in which an enzyme loses its function
Questão 13
Questão
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?
Responda
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pH
-
Heat
-
Amount of water
-
Amount of humidity
Questão 14
Questão
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?
Responda
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Took note of the amount of enzyme used
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Took note of the volume of bubbles produced per minute
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Took note of the temperature changes that occurred
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Took note of the pH changes that occurred
Questão 15
Questão
In carrying out the activity to immobilise an enzyme and examine its application, what substance did you use to immobilise the enzyme?
Responda
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Agar
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Malt agar
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Skimmed milk agar
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Alginate
Questão 16
Questão
In carrying out the activity to immobilise an enzyme and examine its application, what enzyme did you immobilise?
Responda
-
Lipase
-
DNA polymerase
-
Invertase
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Potato phosphorylase
Questão 17
Questão
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?
Responda
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Immobilised enzyme product was kept behind; free enzyme product was allowed out
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Immobilise enzyme product was pure; free enzyme product was cloudy
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Immobilised enzyme product was cloudy; free enzyme product was pure
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Immobilised enzyme product was allowed out; free enzyme product was kept behind
Questão 18
Questão
What are the substrate and product of invertase?
Responda
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Substrate: sucrose; Products: glucose and fructose
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Substrate: maltose; Product: glucose
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Substrate: lactose; Products: glucose and galactose
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Substrate: sucrose; Product: sucrase
Questão 19
Questão
Heat denaturation of an enzyme refers to:
Responda
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The enzyme working at maximum rate
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The enzyme working at an average rate
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The enzyme losing its shape and function
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The enzyme losing its substrates and products
Questão 20
Questão
Batch culture is:
Responda
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Where a large amount of products is added over time and nutrients are produced over time
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Where a large amount of nutrients is added over time and products are produced over time
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Where a fixed amount of products is added and fixed amount of nutrients is produced
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Where a fixed amount of nutrients is added and fixed amount of products is produced
Questão 21
Questão
Continuous-flow culture is:
Responda
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Where products are added over time and nutrients are produced over time
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Where a fixed amount of nutrients is added and a fixed amount of nutrients is produced
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Where nutrients are added over time and products are produced over time
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Where a fixed amount of products are added and a fixed amount of nutrient are produced
Questão 22
Questão
A bioreactor is:
Responda
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A test tube in which biology experiments are carried out
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A beaker in which biological reactions occur
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A reactor in which living organisms carry out metabolism
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A vessel in which a product is formed by a cell or cell component, such as an enzyme
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