Why is an enzyme considered a catalyst? Give two characteristics of catalysts. W

Question

2. Why is an enzyme considered a catalyst?  Give two characteristics of catalysts.

3. What is an active site?

4. What is a substrate?

5. What is a product?

6. Describe how enzymes facilitate chemical reactions.  Make a drawing or describe an enzyme and substrate, enzyme-substrate complex, and resulting product.  (Label the active site on the enzyme.)

2. Why is an enzyme considered a catalyst?  Give two characteristics of catalysts.

3. What is an active site?

4. What is a substrate?

5. What is a product?

6. Describe how enzymes facilitate chemical reactions.  Make a drawing or describe an enzyme and substrate, enzyme-substrate complex, and resulting product.  (Label the active site on the enzyme.)

Explanation / Answer

Enzyme is a biological catalyst that increases the rate of reaction by lowering the activation energy. Increasing the concentration of an enzyme will increase the rate of enzyme-mediated reactions.

The two characteristics of catalysts are:

1. The catalyst remains unchanged in the reaction

2. A small quantity of the catalyst is required.

Activation site of an enzyme is the region where reactants bind to carry out a reaction. Enzyme activity can be increased by increasing the affinity of the enzyme’s activation site.

In biochemistry, the substrate is a molecule upon which an enzyme acts.

A product is a resulting compound of an enzymatic reaction.

Enzyme–substrate complex is the intermediate formed when a substrate molecule interacts with the active site of an enzyme. After the formation of an enzyme–substrate complex, the substrate molecule undergoes a chemical reaction and is converted into a new product.

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