Progress Diagnostic quiz - Feedback + Control - Enzymes

What is the function of the digestive system?

• Breaks down enzymes so they can be absorbed into the blood

• Builds up small molecules into larger ones so they can be used by cells

• Breaks down large molecules into smaller ones so they can be absorbed by the blood

What do enzymes do?

• Speed up the rate of digestion and are used up

• Speed up the rate of digestion without being used up

• Slow down the rate of digestion without being used up

Where on an enzyme does the substrate fit?

• Active site

• Enzyme site

• Substrate site

What food group does amylase break down?

• protein

• sugar

• starch

What is protein broken down into?

• Amino acids

• glucose

• Fatty acid and glycerol

What are lipids broken down into?

• Fatty acids and glycerol

• Amino acids

• Fatty acids

What does protease break down?

• protein

• starch

• sugar

What happens to an enzyme if its temperature exceeds the optimum value?

• It is killed

• It is denatured

• It is destroyed

What is the optimal temperature value for an enzyme?

• The highest temperature

• The temperature when enzyme activity is highest

• The temperature when enzyme activity is lowest

When enzymes are denatured what happens to the active site?

• It changes shape

• It changes size

• It changes composition