Quiz
Chapter 9 Enzymes Revision Questions
Questions in this quiz (22)
1What is an enzyme?
- ACatalyst
- BProtein catalyst
- CCarbohydrate catalyst
- DLipid catalyst
2All the energy in a living organism ultimately comes from the:
- AAir
- BFood
- CWater
- DSun
3Enzymes are:
- AGlobular proteins
- BFibrous proteins
- CMade of lipids
- DMade of carbohydrate
4Which of the following is NOT an enzyme?
- AAmylase
- BMaltase
- CAmylose
- DSucrase
5Which of the following is NOT a catabolic enzyme?
- AAmylase
- BCatalase
- CDNA polymerase
- DSucrase
6Which of the following is NOT an anabolic enzyme?
- APotato phosphorlase
- BSucrase
- CDNA polymerase
- DRNA polymerase
7The pH level affects the rate of action of enzymes.
- ATrue
- BFalse
8Catalase is an enzyme that breaks down:
- AWater
- BHydrogen peroxide
- CStarch
- DProtein
9In carrying out the activity to investigate the effect of pH on the rate of the action of catalase, what factor was deliberately kept constant?
- ApH
- BTemperature
- CAmount of water
- DAmount of humidity
10What was the optimum pH for the enzyme catalase?
- A2
- B7
- C9
11Optimum activity means:
- AConditions under which the enzyme does not work
- BConditions under which the enzyme works very slowly
- CConditions under which the enzyme works normally
- DConditions under which the enzyme works best
12Specificity of an enzyme means:
- AThe way in which an enzyme acts on many substrates
- BThe way in which an enzyme acts on only one substrate
- CThe way in which an enzyme produces a product
- DThe way in which an enzyme loses its function
13In carrying out the activity to investigate the effect of temperature on the rate of the action of catalase, what factor was deliberately kept constant?
- ApH
- BHeat
- CAmount of water
- DAmount of humidity
14In 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?
- ATook note of the amount of enzyme used
- BTook note of the volume of bubbles produced per minute
- CTook note of the temperature changes that occurred
- DTook note of the pH changes that occurred
15In carrying out the activity to immobilise an enzyme and examine its application, what substance did you use to immobilise the enzyme?
- AAgar
- BMalt agar
- CSkimmed milk agar
- DAlginate
16In carrying out the activity to immobilise an enzyme and examine its application, what enzyme did you immobilise?
- ALipase
- BDNA polymerase
- CInvertase
- DPotato phosphorylase
17In 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?
- AImmobilised enzyme product was kept behind; free enzyme product was allowed out
- BImmobilise enzyme product was pure; free enzyme product was cloudy
- CImmobilised enzyme product was cloudy; free enzyme product was pure
- DImmobilised enzyme product was allowed out; free enzyme product was kept behind
18What are the substrate and product of invertase?
- ASubstrate: sucrose; Products: glucose and fructose
- BSubstrate: maltose; Product: glucose
- CSubstrate: lactose; Products: glucose and galactose
- DSubstrate: sucrose; Product: sucrase
19Heat denaturation of an enzyme refers to:
- AThe enzyme working at maximum rate
- BThe enzyme working at an average rate
- CThe enzyme losing its shape and function
- DThe enzyme losing its substrates and products
20Batch culture is:
- AWhere a large amount of products is added over time and nutrients are produced over time
- BWhere a large amount of nutrients is added over time and products are produced over time
- CWhere a fixed amount of products is added and fixed amount of nutrients is produced
- DWhere a fixed amount of nutrients is added and fixed amount of products is produced
21Continuous-flow culture is:
- AWhere products are added over time and nutrients are produced over time
- BWhere a fixed amount of nutrients is added and a fixed amount of nutrients is produced
- CWhere nutrients are added over time and products are produced over time
- DWhere a fixed amount of products are added and a fixed amount of nutrient are produced
22A bioreactor is:
- AA test tube in which biology experiments are carried out
- BA beaker in which biological reactions occur
- CA reactor in which living organisms carry out metabolism
- DA vessel in which a product is formed by a cell or cell component, such as an enzyme
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- Chapter 9 Enzymes Leaving Certificate Biology Revision Questions
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- John Loughlin
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