Enzyme (temp)

Quiz
•
Biology
•
9th Grade
•
Medium
Standards-aligned
Wai Kwan
Used 26+ times
FREE Resource
7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In an experiment to investigate the effect of temperature on the activity of a digestive enzyme X, the time taken for the digestion of a fixed amount of substrate by this enzyme was recorded. Which of the following graphs shows the most likely results of the experiment?
A
B
C
D
Tags
NGSS.HS-PS1-5
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The graph below shows the effect of temperature on enzyme activity:
Which of the following statements correctly describes the enzyme reaction?
The enzyme is denatured at 0oC and 60oC.
The reaction taking place at 50oC is faster than that at 20oC.
There are more collisions between substrate and enzyme molecules at 40oC than 60oC.
The amount of product collected at the end of the reaction is greatest if the reaction takes place at 40oC.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Two boiling tubes containing 5 cm3 of hydrogen peroxide solution and 1 cm3 of catalase solution respectively were kept at 25oC for 10 minutes. The contents of the two tubes were then mixed and maintained at the same temperature, and the amount of oxygen released was recorded for 5 minutes. The results are shown in the graph below:
The line levels off at the 3rd minutes. Which of the following is a correct explanation for this?
The reaction stops at the 3rd minutes because catalase has been used up.
The reaction stops at the 3rd minutes because hydrogen peroxide has been used up.
The reaction rate reaches the maximum at the 3rd minutes because the amount of oxygen released is highest.
The reaction rate reaches the maximum at the 3rd minutes because there is no more increase in the amount of oxygen released.
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The same experiment was repeated but the contents were kept at 35oC. Which of the following would best indicate the results of this experiment?
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following graphs correctly shows the changes in the amount of products in a reaction catalysed by a human enzyme at different temperatures?
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Two test tubes containing 5 cm3 of hydrogen peroxide solution and 1 cm3 of catalase solution respectively were kept at 30°C for 30 minutes. The content of the two tubes were then mixed and maintained at the same temperature, and the amount of oxygen released was recorded for 5 minutes. The same experiment was repeated at 40°C. The results are shown in the graph below:
The initial rate of oxygen production at 40°C is higher than that at 30°C because
catalase is denatured at the lower temperature.
oxygen is less soluble at the higher temperature.
more active sites are present in the enzyme molecules at the higher temperature.
the substrate molecules have more kinetic energy at the higher temperature.
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A third experiment was carried out as before but the contents were kept at 90°C. Which of the following would best indicate the result of this experiment?
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