Action of Salivary Amylase on Starch

1.

Multiple Choice

30 sec

1 pt

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

30 sec

1 pt

The digestion of food starts at the ______.

Alimentary Canal

Intestine

Stomach

Mouth

3.

Multiple Choice

30 sec

1 pt

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

30 sec

1 pt

The enzyme salivary amylase is most active at pH ______.

6.8

5.4

2.5

10

5.

Multiple Choice

30 sec

1 pt

Which of the following digestive enzyme is found in the saliva?

Mucin

secretin

Salivary amylase

Pepsin

6.

Multiple Choice

30 sec

1 pt

The salivary amylase hydrolyses starch into __________.

Lipids

Carbohydrate.

Maltose

Fats

7.

Multiple Choice

30 sec

1 pt

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

30 sec

1 pt

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

30 sec

1 pt

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

45 sec

1 pt

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 Choice

45 sec

1 pt

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.

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