EASY
AS and A Level
IMPORTANT
Earn 100

The graph shows the effect of changes in pH on the activity of the enzyme lysozyme. 

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Describe the effect of pH on this enzyme. 

Important Questions on Enzymes

MEDIUM
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>Question>Q 2

Why is it better to calculate the initial rate of reaction from a curve such as the one in. In given figure how much oxygen is given off in 30 seconds? 

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MEDIUM
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>Question>Q 3
 In the breakdown of starch by amylase, if you were to plot the amount of starch remaining against time, draw the curve you would expect to obtain. 
MEDIUM
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>Question>Q 3
In the breakdown of starch by amylase, if you were to plot the amount of starch remaining against time, draw the curve you would expect to obtain. How could you use this curve to calculate the initial reaction rate? 
MEDIUM
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>Question>Q 4
How could you carry out an experiment to determine the effect of temperature on the rate of breakdown of hydrogen peroxide by catalase? 
MEDIUM
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>Questions>Q 11

Outline an experiment you could carry out to investigate how long it takes the enzyme lactase to denature at 90°C 

When free in solution

MEDIUM
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>Questions>Q 11

Outline an experiment you could carry out to investigate how long it takes the enzyme lactase to denature at 90°C

When immobilised in alginate beads.

EASY
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>Questions>Q 11

Outline how you would determine the optimum pH of the enzyme lactase

When immobilised in alginate beads.

EASY
AS and A Level
IMPORTANT
Biology for Cambridge International AS & A Level coursebook 2nd Edition Digital Access>Chapter 3 - Enzymes>EXAM-STYLE QUESTIONS>Q 7

The graph shows the effect of changes in pH on the activity of the enzyme lysozyme. 

Question Image

Explain why pH affects the activity of the enzyme.