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Chapter 9 Enzymes Revision Questions

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Chapter 9 Enzymes Leaving Certificate Biology Revision Questions
John Loughlin
Quiz by John Loughlin, updated more than 1 year ago
John Loughlin
Created by John Loughlin about 8 years ago
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Resource summary

Question 1

Question
What is an enzyme?
Answer
  • Catalyst
  • Protein catalyst
  • Carbohydrate catalyst
  • Lipid catalyst

Question 2

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

Question 3

Question
Enzymes are:
Answer
  • Globular proteins
  • Fibrous proteins
  • Made of lipids
  • Made of carbohydrate

Question 4

Question
Which of the following is NOT an enzyme?
Answer
  • Amylase
  • Maltase
  • Amylose
  • Sucrase

Question 5

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

Question 6

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

Question 7

Question
The pH level affects the rate of action of enzymes.
Answer
  • True
  • False

Question 8

Question
Catalase is an enzyme that breaks down:
Answer
  • Water
  • Hydrogen peroxide
  • Starch
  • Protein

Question 9

Question
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?
Answer
  • pH
  • Temperature
  • Amount of water
  • Amount of humidity

Question 10

Question
What was the optimum pH for the enzyme catalase?
Answer
  • 2
  • 7
  • 9

Question 11

Question
Optimum activity means:
Answer
  • 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

Question 12

Question
Specificity of an enzyme means:
Answer
  • 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

Question 13

Question
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?
Answer
  • pH
  • Heat
  • Amount of water
  • Amount of humidity

Question 14

Question
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?
Answer
  • 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

Question 15

Question
In carrying out the activity to immobilise an enzyme and examine its application, what substance did you use to immobilise the enzyme?
Answer
  • Agar
  • Malt agar
  • Skimmed milk agar
  • Alginate

Question 16

Question
In carrying out the activity to immobilise an enzyme and examine its application, what enzyme did you immobilise?
Answer
  • Lipase
  • DNA polymerase
  • Invertase
  • Potato phosphorylase

Question 17

Question
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?
Answer
  • 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

Question 18

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

Question 19

Question
Heat denaturation of an enzyme refers to:
Answer
  • 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

Question 20

Question
Batch culture is:
Answer
  • 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

Question 21

Question
Continuous-flow culture is:
Answer
  • 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

Question 22

Question
A bioreactor is:
Answer
  • 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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