Enzyme Activity and Potato Experiment

The video tutorial demonstrates a potato experiment to observe enzyme catalase activity. Potatoes are prepared by cutting them into different sizes to vary surface area. Test tubes are set up with hydrogen peroxide and acetic acid to observe reactions. The experiment shows how enzyme activity is affected by surface area and chemical denaturation, with test tube three showing the most activity due to increased surface area.

What was the first step in preparing the potato for the experiment?

• Boiling the potato

• Freezing the potato

• Marking and cutting the potato

• Peeling the potato

Why was the video recorded at high speed?

• To demonstrate the speed of the reaction

• To make the video more entertaining

• To summarize the process quickly

• To show the experiment in slow motion

What was the purpose of cutting the potato into smaller pieces?

• To change the color of the potato

• To make it fit into the test tube

• To increase the surface area

• To reduce the weight of the potato

What liquid was added to the test tubes along with the potato pieces?

• Hydrogen peroxide

• Salt solution

• Water

• Acetic acid

Which test tube contained acetic acid?

• Test tube 4

• Test tube 2

• Test tube 3

• Test tube 1

What was the main observation in test tube 3?

• The potato dissolved

• More bubbles were produced

• The potato changed color

• No reaction occurred

What does the enzyme catalase do in the reaction?

• Converts oxygen into hydrogen peroxide

• Converts hydrogen peroxide into water and oxygen

• Converts water into hydrogen peroxide

• Converts acetic acid into water

Why did test tube 4 show a different result?

• The enzyme was denatured by acetic acid

• The test tube was not sealed

• The potato was too small

• The potato was not cut properly

What was the effect of boiling the potato in test tube 2?

• Denatured the enzyme

• Increased enzyme activity

• No effect on the reaction

• Changed the color of the potato

Which test tube showed the best results for enzyme activity?

• Test tube 1

• Test tube 2

• Test tube 4

• Test tube 3