Enzymes Quiz

What are enzymes?

• Carbohydrates

• Lipids

• Nucleic acids

• Proteins

What is the optimum temperature for most enzymes in humans?

• 25°C

• 60°C

• 45°C

• 37°C

What happens to enzymes beyond the optimum temperature?

• They increase in number

• They stop working

• They become more efficient

• They start to denature

What is the main factor affecting the activity of enzymes?

• Light intensity

• Temperature

• Humidity

• Pressure

What is the lock-and-key hypothesis in relation to enzymes?

• The enzyme and substrate are both keys

• The enzyme is the lock and the substrate is the key

• The enzyme and substrate are both locks

• The enzyme is the key and the substrate is the lock

What is the effect of extreme pH on enzyme activity?

• It has no effect

• It denatures the enzyme

• It decreases activity

• It increases activity

What happens when the substrate concentration exceeds the maximum for enzyme reaction?

• The enzyme becomes denatured

• The rate of reaction increases

• The enzyme stops working

• The enzyme molecules become saturated

What type of reaction results in the breakdown of complex organic molecules into simpler substances?

• Anabolic reaction

• Neutralization reaction

• Oxidation reaction

• Catabolic reaction

What is the main commercial application of protease in the food processing industry?

• Tenderising meat

• Extracting agar from seaweed

• Making lactose free milk

• Removing starch from fabrics

What is the main function of amylase in the textile industry?

• Biopolishing cotton fabrics

• Removing starch from fabrics

• Extracting agar from seaweed

• Tenderising meat