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WorksheetsIsca Biology: Enzymes (triple)
Total questions: 28
Worksheet time: 21mins
In the diagram, what is letter C?
active site
enzymes
substrate
products
Which substrate would this enzyme catalyze?
Each enzyme only has one substrate that will fit its active site. What is this called?
citation
denaturation
specificity
peculiarity
What is the optimal pH of enzyme A?
8
2
5.7-10
10
Which factor does NOT affect the rate of enzyme activity?
Light intensity
Temperature
pH
Concentration
What happens when enzymes are heated above the optimum temperature?
The enzymes die
The shape of the enzyme changes as it denatures
The enzymes become more active
The enzymes remain the same
Which of the following denatures an enzyme?
High temperature
Incorrect pH
High temperature AND incorrect pH
Neither temperature or pH
Which of these is NOT an enzyme
amylase
protease
lipase
glycerol
Lipids get broken down by lipase into...
Amylase
Glucose/simple sugars
Amino acids
Fatty acids and glycerol
Protein gets broken down by protease into...
Amino acids
Simple sugars eg: glucose
Fatty acids and glycerol
What is the chemical test for starch?
iodine turns blue-black with starch
glucose turns blue-black with starch
iodine turns yellow with starch
glucose turns yellow with starch
What effect does amylase have on starch?
No effect
It turns starch into iodine
It turns starch into glucose
It turns starch into fructose
What effect will lowering the pH from 6 to 4 have on the time taken for a starch and human amylase solution to stay yellow when iodine is added?
The time taken will increase
The time taken will decrease
No effect
The reaction will no longer take place
If it takes 150s for a reaction to occur under normal conditions, how long will it take if the rate is tripled?
450
300
150
75
50
