Lactose and Enzyme Function Concepts

The video explores the function of the enzyme lactase, which helps digest lactose in dairy products. It demonstrates how lactase breaks down lactose into glucose and galactose, and how heat can denature enzymes, rendering them ineffective. The video also shows that lactase does not break down sucrose, highlighting enzyme specificity.

What enzyme is responsible for breaking down lactose in dairy products?

• Lipase

• Amylase

• Lactase

• Protease

What percentage of the human population has a reduced ability to produce lactase?

• 60%

• 30%

• 50%

• 40%

What are the two monosaccharides that lactose is broken down into?

• Sucrose and Glucose

• Glucose and Fructose

• Galactose and Fructose

• Glucose and Galactose

What was the result of adding lactase enzyme to milk in the experiment?

• Increase in lactose levels

• Increase in glucose levels

• No change in glucose levels

• Decrease in glucose levels

How does heat affect the function of enzymes like lactase?

• It converts the enzyme into a different form

• It denatures the enzyme, reducing its activity

• It has no effect on enzyme activity

• It enhances enzyme activity

What is the optimal temperature range for enzyme activity?

• Below freezing point

• Room temperature

• Boiling point

• Any temperature

Why does lactase not break down sucrose?

• Sucrose is too complex

• Lactase is specific to lactose

• Lactase is inactive in sucrose

• Sucrose is not a sugar

What are the monosaccharides that make up sucrose?

• Sucrose and Glucose

• Glucose and Galactose

• Glucose and Fructose

• Fructose and Galactose

What does the specificity of enzymes mean?

• Enzymes can be used in any reaction

• Enzymes only react with specific substrates

• Enzymes can react with any substrate

• Enzymes are not affected by temperature

What is the primary function of lactase in the human body?

• To break down proteins

• To break down lactose into glucose and galactose

• To digest fats

• To synthesize lactose