Chapter 9 Enzymes Revision Questions

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Chapter 9 Enzymes Leaving Certificate Biology Revision Questions
John Loughlin
Quiz por John Loughlin, atualizado more than 1 year ago
John Loughlin
Criado por John Loughlin mais de 7 anos atrás
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Resumo de Recurso

Questão 1

Questão
What is an enzyme?
Responda
  • Catalyst
  • Protein catalyst
  • Carbohydrate catalyst
  • Lipid catalyst

Questão 2

Questão
All the energy in a living organism ultimately comes from the:
Responda
  • Air
  • Food
  • Water
  • Sun

Questão 3

Questão
Enzymes are:
Responda
  • Globular proteins
  • Fibrous proteins
  • Made of lipids
  • Made of carbohydrate

Questão 4

Questão
Which of the following is NOT an enzyme?
Responda
  • Amylase
  • Maltase
  • Amylose
  • Sucrase

Questão 5

Questão
Which of the following is NOT a catabolic enzyme?
Responda
  • Amylase
  • Catalase
  • DNA polymerase
  • Sucrase

Questão 6

Questão
Which of the following is NOT an anabolic enzyme?
Responda
  • Potato phosphorlase
  • Sucrase
  • DNA polymerase
  • RNA polymerase

Questão 7

Questão
The pH level affects the rate of action of enzymes.
Responda
  • True
  • False

Questão 8

Questão
Catalase is an enzyme that breaks down:
Responda
  • Water
  • Hydrogen peroxide
  • Starch
  • 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
  • pH
  • Temperature
  • Amount of water
  • Amount of humidity

Questão 10

Questão
What was the optimum pH for the enzyme catalase?
Responda
  • 2
  • 7
  • 9

Questão 11

Questão
Optimum activity means:
Responda
  • 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

Questão 12

Questão
Specificity of an enzyme means:
Responda
  • 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

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
  • 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
  • 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

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
  • Agar
  • Malt agar
  • Skimmed milk agar
  • 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
  • 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
  • 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

Questão 18

Questão
What are the substrate and product of invertase?
Responda
  • Substrate: sucrose; Products: glucose and fructose
  • Substrate: maltose; Product: glucose
  • Substrate: lactose; Products: glucose and galactose
  • Substrate: sucrose; Product: sucrase

Questão 19

Questão
Heat denaturation of an enzyme refers to:
Responda
  • 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

Questão 20

Questão
Batch culture is:
Responda
  • 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

Questão 21

Questão
Continuous-flow culture is:
Responda
  • 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

Questão 22

Questão
A bioreactor is:
Responda
  • 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

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