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- 1. Multiple Choice
What is the meant by optimum temperature for enzyme activity?
The temperature at which the enzyme deactivated.
The temperature at which the enzyme denaturated.
The temperature at which the enzyme shows the maximum activity.
The temperature at which the enzyme shows the minimum activity.
- 2. Multiple Choice
The digestion of food starts at the ______.
Alimentary Canal
Intestine
Stomach
Mouth
- 3. Multiple Choice
The optimum temperature for the enzymatic activity of salivary amylase ranges from ______ to ______.
32 °C to 37 °C.
5 °C to 10 °C.
-10 °C to 10 °C.
30 °C to 32 °C.
- 4. Multiple Choice
The enzyme salivary amylase is most active at pH ______.
6.8
5.4
2.5
10
- 5. Multiple Choice
Which of the following digestive enzyme is found in the saliva?
Mucin
secretin
Salivary amylase
Pepsin
- 6. Multiple Choice
The salivary amylase hydrolyses starch into __________.
Lipids
Carbohydrate.
Maltose
Fats
- 7. Multiple Choice
What is an achromic point?
The point at which the enzyme shows the maximum activity.
The point at which the enzyme denaturated.
Time during the action of amylase on starch at which the reaction mixture no longer gives a colour with iodine.
The time required to digest starch partially by the enzyme-salivary amylase.
- 8. Multiple Choice
In the stomach the salivary amylase is not functioning. Why?
Stomach is highly acidic.
pH of stomach is more than 6.
Digestion of starch is not happening in stomach.
Stomach is highly basic.
- 9. Multiple Choice
The experiment set up to study the effect of temperature on the activity of salivary amylase on starch is carried out at 10 °C. The solution mixture that contains amylase and starch keeps on giving blue colour for iodine test about half an hour. What is the reason for this?
At the lower temperature, reaction rate of starch reduces.
At the lower temperature, starch loss its functionality.
At the lower temperature, the enzyme is more activated.
At the lower temperature, the enzyme is deactivated.
- 10. Multiple Choice
What is a valid conclusion based on the graph?Temperature influences an enzyme's activity rate.The maximum rate of human respiration occurs at about 57°C.Growth can be controlled by enzyme action.The maximum rate of human digestion occurs at about 45°C. - 11. Multiple ChoiceWhat is a valid conclusion based on the graph?Temperature influences an enzyme's activity rate.The maximum rate of human respiration occurs at about 57°C.Growth can be controlled by enzyme action.The maximum rate of human digestion occurs at about 45°C.
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