Enzyme Quiz Review

Which statement about enzymes is not correct?

• Enzymes are composed (made of) polypeptide chains

• Enzymes speed up chemical reactions by lowering the activation energy

• Enzymes are destroyed when they are used and must be synthesized (made) for each reaction

• Enzymes are specific because of their shape and catalyze only certain reactions

What is the optimal pH for gastric protease?

What is the optimal pH for intestinal protease?

Meat tenderizer contains an enzyme that interacts with meat. If meat is coated with a tenderizer and then placed in a refrigerator for a short time, how would the enzyme be affected?

• It would be broken down

• Its activity would slow down

• Its shape would change

• It would no longer act as an enzyme

Enzymes contribute to chemical reactions in a cell by:

• Changing into products so a smaller amount of reactants is needed

• Changing into reactants so a smaller amount of a product is needed

• Lowering the amount of activation energy required to make a reaction occur

• Increasing the amount of activation energy required to make the reaction occur

Select the 2 that are expected to IINCREASE the rate of en enzymatic reaction

• Add more enzymes

• Adjust the pH to optimal level

• Freezing

• Add more substrate

Select all answers that are TRUE

• Enzymes interact with specific substrates

• Enzymes speed up reactions

• Enzymes are made of protein

• Enzymes change shape after a reaction occurs

• One enzyme can be used for many different types of chemical reactions

Select the correct NUMBER that represents the substrate

Select the correct NUMBER that represents the products

The enzyme lipase breaks down lipids into which of the following molecules?

• Glycerol and fatty acids

• Sugars and glycerol

• Fatty acids and amino acids

• Amino acids and sugars