CIE iGCSE Co-Ordinated Science B5. Enzymes Exam Style Questions Paper 1
Question
The Pompeii worm lives in deep-sea hydrothermal vents where average temperatures are often as high as 68 C.
Which graph represents the activity of enzymes found in the Pompeii worm?
▶️Answer/Explanation
Ans :B
Question
Catalase is an enzyme that breaks down hydrogen peroxide to form a foam of water and oxygen.
The maximum height of the foam produced at different temperatures in a given length of time is measured.
The rate of the reaction is proportional to the height of foam.
The table shows the results.
Which conclusion can be drawn from these results?
A Increasing the temperature decreases the rate of the reaction up to 50 ºC.
B Increasing the temperature decreases the rate of the reaction up to 60 ºC.
C Increasing the temperature increases the rate of the reaction up to 40 ºC.
D Increasing the temperature increases the rate of the reaction up to 50 ºC.
▶️Answer/Explanation
Ans :A
Question
Fungus can live at the base of human hair where the activity of one of its enzymes can cause dry skin.
The graph shows the action of the fungal enzyme at different pH values.
Different shampoos have different pH values.
Which shampoo causes the greatest amount of dry skin?
A pH3 B pH5 C pH7 D pH9
▶️Answer/Explanation
Ans : B
Question
Which process involves enzymes?
(A) absorption
(B) digestion
(C) egestion
(D) ingestion
▶️Answer/Explanation
Ans: B