Enzyme Reactions in Food

The video tutorial explores enzyme reactions in food, focusing on catalase breaking down hydrogen peroxide. It includes experiments on the effects of pH, temperature, and substrate concentration on enzyme activity, using bananas as a source of catalase. Observations are made based on bubble formation, indicating enzyme activity.

What is the primary enzyme discussed in the video that breaks down hydrogen peroxide?

• Amylase

• Catalase

• Lipase

• Protease

In the pH experiment, which test tube showed the most bubble formation?

• Test tube with water

• Test tube with sodium hydroxide

• Test tube with vinegar

• Test tube with hydrochloric acid

What was the observed pH level of the test tube with sodium hydroxide?

• Around 1

• Around 7

• Around 12 or 13

• Around 5

How does temperature generally affect enzyme activity according to the video?

• Enzyme activity is unaffected by temperature

• Lower temperatures always increase enzyme activity

• Higher temperatures always increase enzyme activity

• Enzyme activity can vary with temperature changes

Which temperature condition showed the least bubble formation in the temperature experiment?

• Room temperature

• Ice water

• Boiling water

• Warm water

In the substrate concentration experiment, which test tube had the highest concentration of hydrogen peroxide?

• Fourth test tube

• Third test tube

• Second test tube

• First test tube

What was the approximate concentration of hydrogen peroxide in the third test tube during the substrate concentration experiment?

• 3%

• 0.03%

• 1%

• 5%

What is the main indicator of enzyme activity in the experiments conducted?

• Temperature change

• Bubble formation

• Color change

• Weight change

Which factor was NOT varied in the experiments?

• Enzyme type

• Substrate concentration

• Temperature

• pH level

What was the purpose of using bananas in the experiments?

• To provide a source of catalase

• To change the color of the solution

• To act as a control variable

• To measure the weight of the reaction