Enzyme Activity and Starch Digestion

The video tutorial demonstrates a classic experiment on starch digestion using salivary amylase. Two test tubes are prepared, one with deionized water and the other with salivary amylase, both containing a potato plug. After incubation in a 37°C water bath, Benedict solution is added, turning both tubes blue. The tubes are then placed in boiling water, where the tube with amylase changes color, indicating starch digestion, while the other remains blue.

What is the main purpose of the experiment discussed in the video?

• To measure the temperature of boiling water

• To observe the digestion of starch using salivary amylase

• To test the pH level of potato plugs

• To compare different types of enzymes

What is added to test tube one during the preparation phase?

• 5 milliliters of starch

• 5 milliliters of Benedict's solution

• 10 milliliters of deionized water

• 10 milliliters of amylase

What is the role of the water bath in the experiment?

• To cool down the test tubes

• To maintain a constant temperature for enzyme activity

• To dissolve the potato plug

• To change the color of the solution

What is the initial color of the Benedict's solution when added to the test tubes?

• Yellow

• Blue

• Green

• Red

What happens to the test tubes after adding Benedict's solution?

• They both turn red

• They both turn blue

• They both turn green

• They both turn yellow

Where are the test tubes placed after adding Benedict's solution?

• In a fume hood

• In a cold water bath

• In a refrigerator

• In a boiling water bath

What color change is observed in the test tube with amylase after heating?

• It remains blue

• It turns purple

• It turns green

• It turns a dark color and then red or orange

What is the final color of the test tube with only deionized water and potato plug?

• Red

• Blue

• Yellow

• Orange

What does the color change in the test tube with amylase indicate?

• Starch was not digested

• The solution was contaminated

• Starch was digested by amylase

• No reaction occurred

What is the significance of the color difference between the two test tubes at the end of the experiment?

• It proves that the experiment was unsuccessful

• It demonstrates the effectiveness of amylase in starch digestion

• It indicates that amylase did not work

• It shows that both tubes had the same reaction